Well for muting, you can discuss strategy easier. But, at least from personal experience, the chat isn't so much used to discuss strategy as it is to type "Baron", "drag", "Shove mid", etc, which all are easily, and quickly, conveyed through pings and common sense. There's not much productive discussion that goes on, really. Now this may be personal experience, but he speaks from a Silver stand point. My seasons have always been between Silver and Gold, so I assume that my experiences should be similar to his, and that is the chat being used moreso for toxicity. Doesn't have to be blatant toxicity. Even a simple "This X" or "Why?" These tilt people, these create heat between teammates, and the game is harder 5v6 or more. There's no need for them. Why did Evelynn go in and get obliterated? That's not a real question, and the person asking "Why?" isn't looking for a real answer. The reason wasn't to int and lose LP, it was because in their mind the outcome would be different, but due to unforeseen circumstances (to them), it did not work out that way. Every time. These sorts of little quips hurt team cohesion, and that's mainly what I see chat used for. Sometimes it's to call someone pure cancer and to uninstall, sometimes it's to say "This Lee doesn't gank." Great. Ask for a gank, don't make these dumb comments that will ONLY serve to piss someone off and hurt the game.
So, to me, everything that needs to be said can be done through pings. Now, I'm not saying this is necessary to climb of course. Most of my games go unmuted. "When people start to blame each other," was his quote I zero'd in on. There's no blaming with mute, so easier to keep a level head. You give up a lot of interaction sure, but in my experiences, you lose a lot more negative interaction than positive. The main positives you lose are the "gj" and "nice" that happens after good plays, but they really aren't that important in my honest opinion. Goes back to the self-congratulatory thing I also elaborated on. Now this may not work for everyone. You may be the kind of person who likes to talk a bunch to teammates and stuff, and I encourage it. But, as I'm sure you can attest to, with all that strategizing and complimenting, there's a lot of toxicity, blaming and just flat out flaming. I personally believe the toxicity hurts games more than the compliments helps the game.
For one tricking, I'm actually a victim of this. Remember, everything I said isn't fact, just my opinion and take on things. I main Zed, but for a while, I tried just one tricking him. Love the montages I see, thought if I only played Zed, I'd be able to be like those montages and perform (sorta) like they do and outplay people left and right. At first, it worked. I played a bunch of Zed, worked on my mechanics, and found myself doing some pretty expert shadow play for a Gold (Not bragging, just stating what I've heard in-game from both allies and enemies). So I kept going, and it became monotonous. I'd get -too- used to the champion and the kit, if you know what I mean. It went from creatively outplaying an opponent to "I need to do X,Y,Z to win" which doesn't allow for flexibility, which obviously is bad in a game like League. While one tricking theoretically should force you to constantly practice and perfect one champion, from my experience, it works at first but then begins deteriorating as you get too used to it. You get too comfortable, in a sense. You get more confident in yourself, which is usually good, but it has you making plays that ordinarily you might think were dumb but arrogance tells otherwise.
On top of that, you limit your skill set. Not only are you not practicing other champions' kits, you're cementing a playstyle in your head, and your mechanics will follow as such. Now, while playing that champion, this mindset works. But what happens when you one trick Zed, Zed gets banned, and you play Ziggs? Zed is an all in, split second decision-making champion, who works on no mana, heavy lane harass basis. He roams any second he gets, and gets himself into ordinarily bad situations that he can get out of due to his shadows and ult. Ziggs is nothing like him. After one tricking Zed, I found myself spamming spells more as mana champions, I found myself going deep a lot more when I really shouldn't have. I found myself playing like a mobile assassin when I simply wasn't because that's how my brain was wired. I'd disregard vision more because I was used to my over-walls shadows that could save me, or the teleporting potential of using my ultimate and shadows to reposition myself at will. So, as someone like Orianna, I'd be more daring and get killed for it since I can't have my ball carry me over a wall. It's not that I believed Orianna was Zed and I could just go into the dragon pit and fight and get out later. It's that I'd go into a fight at dragon, but not properly kite or retreat before it was too late since that was how I played League as a one trick.
So, Zed performance dipped. Went from like an 80% win rate on zed to something lower, don't remember what it was. Now this could be attributed to me climbing from Gold 5 to gold 2, but it's also partly me just getting to used to gameplay. Went from harassing in lane properly by positioning shadow correctly and really aiming my skillshots to "W-E-Q" over and over, since technically that's how you properly do it, but must be done strategically and not just to hit them with something. So, I stopped one tricking him and re-developed my core of Zed, Diana and Viktor (dropped LB since her rework just didn't suit me) and things improved. My performance on Zed improved as well since I broke a monotonous habit.
Plus, if you one trick, and they get banned or counterpicked, good luck. You'll most likely perform poorly on other champions, which in turn causes more toxicity on your team, which in turn further increases the chance you'll lose. It's just a bad spiral to be on. Not saying one trick doesn't work. Take a look at Anniebot, or Cowsep, Tyler1, Shaclone, Yassuo, etc. They're all pretty high elo one tricks covering a range of complex champions to brain dead ones. But for most, it probably won't. One tricking is better once you've cemented down game knowledge and mechanics. But to climb out of silver just one tricking? You may find yourself in a higher ELO trying to learn new things but getting absolutely demolished since while your one champion may be at, say, a plat level, your actual game knowledge and other champions could still be sitting at a silver level.
