Riot, why don't you just buff champs without mobility?
Honestly, I find it really annoying that nothing has been done about the mobility creep. Every game at high elo right now, is the same old recycled champs over and over again, especially mid lane.
they all get so much reward for so little risk. Before people start arguing that all those assassins put themselves in harm's way to get their kills, I'd also like to throw in the fact that they can outtrade anyone else as early as lvl 2 simply because they can use their get out of jail free abilities to avoid any real punishmet. It's been a while since i've seen karthus, anivia, lux or any of the older mages and it is really upsetting.
Riot, since you're not very inclined to nerfing those precious assassins, how about you just buff the older mages? Make them tankier early game, give them slightly more range, buff their base damage or ap ratios early game so they can trade more effectively, but don't just forget about them and keep spamming mobility champions that make playing this game strongly stacked in their favor.
and then the enemy
and roams bot for a double. Suddenly you have lost lane and you can't farm safely due to unsafe spell ranges and such. I'm sure other mages fit into this scenario. Ex.

,
,
, and barely
and
don't have the average balance, and they mostly make up for that with a stronger amount of damage and/or defense.
he has a rework coming so it's fine for now
after early game i just don't know, her scaling is extremely undertuned
he has no way of contributing to his team as a real tank; with all the tank buffs, though, he may see more use in teamfights thanks to more acessible engage