Are runes really necessary?

As someone who has only been playing for about a year I have next to no knowledge about why things are the way they are now, I just accept balance as it comes. One thing that has always seemed as a pay(or grind unhealthy amounts) to win system was runes. From what I've read Riot sees this as a way to make how you play more customizable. Which is only done in very niche scenarios, like adding an xp quint for a specific jg route, but most of the time you run optimized runes or you are just wasting stats and playing at a disadvantage. So while the very top players may be able to figure out very small things you can do with this system all it really does for the majority of players is hold back new players.

Riot obviously see's that this current system has its flaws. They might think the flaws are different then what I think but with the rework to the system I think it is safe to say that they see the current system as unhealthy for the game. However, half of the new rune ideas they are bringing out just seem to be disgusting to try and balance around. The new one where ulting will lower cd on the ult up to 10 times. and both immediately come to mind. will have a <30 second ult cooldown. I feel like either that rune will make them so op the champs will just get nerfed or the rune will get scrapped. It makes me wonder if these new runes, while getting rid of unfair advantages older and wealthier players have, will just wreck game balance and in general make the game less fun to play.

Wouldn't it be better to just get rid of runes entirely and balance base stats on champs accordingly?

The only thing that this wouldn't do, that I think the new runes aim to do, is fix the illusion of pre game customization to allow for stylized play. When I look at the new system I don't think it will be used to play a champ slightly more how you want it to play. I think it will be abused to break whatever champ it can. Nobody is looking how to make x champion do x better because they prefer that, they are looking how to make x champion the absolute strongest it can be.

When changing how the jg worked this pre season one of riots main concerns were something along the lines of "some people had figured out optimable jging and others hadn't so they wanted to add in more variance and encourage other, maybe slightly riskier, play styles" so they added things like plants and catch up xp. Like I said, I believe that is what they are attempting to do with these new runes, encourage varied play styles. But isn't the same exact thing that happened to old runes just going to happen with these new runes? The only difference is that instead of old runes where you had to pay in time or money to be able to set up the already figured out optimable runes on a champion for extra stats everyone will just use the already figured out most game breaking rune set up on x champ. Jg changes worked, I think, because it is a dynamic role with choices that will change drastically as every game goes on. Runes set up will not do that though, laning is too black and white. "Riven into Jayce you take x and x runes, Riven into Galio you take x and x runes instead because he will take x and x runes." I'm worried that is going to be the "customization of play styles" these runes offer, while also breaking game balance for a while.

So to wrap things up I'm really worried these new runes will not actually add anything of value other then being a flashy version of older runes that you don't have to buy and make the game frustrating to play while all the balancing gets ironed out.

Thoughts?