The thing I miss the most was how the game was played. Back when I started playing every other youtuber had shit like "5 support comp!" and my personal favorite "Breaking the Meta" by the mighty Solwolf. Soraka + Alistar bot lane. Yi mid. Random AP scalings on AD champs! AD Malphite! AP Tristana! Xin Xiao was a man, and Skarner missed his kind. The lore was more campy but also somehow, more interesting. Garen is spinning on Teemo in top lane because I summoned him and made him. We existed in the lore back then... alongside Swain's chessmaster-style takeover of Noxus, the Ionia war and Blitzcrank's dating service. Fun, goofy shit... but good shit. I'm sure when they do the revamped noxus lore it'll be over-dark edgelord bullshit without any soul or humor.
These days I'm not even mad about the meta being so freaking stagnant... I'm mad that there's such a strict meta at all. I'm mad that EVERYONE has a dash and % damage. I'm mad that picking something but the 3 meta-approved champs for your role will likely get you flamed into the ground. Every video now is "So-and-so champ/item/strat is BROKEN!". Every game feels insanely toxic and every player has a hair-trigger. Every game feels like a complete stomp, and a single player's contribution to the game is far, FAR less meaningful than it was.
Some of this is nostalgia, most certainly... But man... I'd have rather the game updated it's graphics without changing it's mechanics. I had fun back then playing AD Malphite or Sona... or Jarvan/Xin Zhao bot. I didn't feel the need to /mute all at the start of every game because if I didn't the game would be more toxic than an all-for-one game of nothing but Singed. I looked FORWARD to new champs instead of dreading what overloaded, overpowered trash with terrible lore they were gonna throw at us. The game didn't take itself so fuckin' seriously and neither did the players. I would rather play a million games as Surprise Party Fiddlesticks and lol at hurling balloon doggies at people than suffer through a single one using the new Riven, Yas and Kayn skins. Over-serious edgy shit without a shred of humor or self-awareness about how over-serious edgelord it all is.
I'm just ranting now, so I'm through. I guess the TL: DR would be "I agree". Let's go with that.