Why does Rito never revert nerfs?
Just thinking that riots followup on champion nerfs is really bad. Once a nerf goes live they rarely, if ever, revert or change the nerf on subsequent patches, unless they want to nerf even harder. Even in cases where it's obvious that ther nerfs are just too damn much. Particularly thinking about the patch 4.21 warwick destruction: it's pretty clear that the devourer and skirmishers changes ALONE would have thrown him out of his OP spot, but riot decided to nerf him even harder than that effectively giving him the good old Olaf. Haven't seen a warwick since. And despite that there was no sign of reverting, or even just following up on the champions state. It's like as long as they get a champ out of flavour of the month, it doesn't matter what happens after that. Lucian is similar. I mean he's decent, but there's really no reason to not give him the slight slight buff he needs to be on par with Graves, thus getting him into the competitive ad carry rotation as something other than a "well graves was banned/taken and we wanted that kind of champ".
Why tito? why never check up on nerfs and go, ok we hit it a tad hard here lets revert this but keep the rest and he'll be in a good spot. It can't be that hard to give a slight buff after every nerf as necessary.
got nerfed to the ground because he just got to deal way too much damage with a point-and-click ult, and 
got placed in a state he should've been in since release, where his huge mobility comes at a large cost in safety and damage. If these champions were to receive buffs, those buffs would likely apply to other parts of their kit, and not just be nerf reversions. Buffing champions is also a matter of what exactly needs a buff, and how that needs to be applied. If Warwick is lacking damage, for example, perhaps it would be better to buff his attack damage, attack speed or on-hit effect, and leave his Q/W/R untouched, or the reverse if you wanted more situational damage.
, I think Graves is in pretty much the same state as Lucian before his kit rework: he definitely has some unique features (resilience, massive burst, vision denial), but also has a little bit of everything, so he doesn't exactly have really large weaknesses to exploit besides his high mana costs. That's also why he was, and still is, frequently compared to Lucian: both are bursty mobile champs with a hit-and-run playstyle, and when Lucian was top dog, there was no real reason to pick Graves. Now that Lucian was made more niche, Graves is the more dominant pick. Graves needs a small retune in the same manner as Lucian, so that he'd have even more pronounced strengths (bursty frontliner carry, anyone?), but also much clearer weaknesses (an even shorter autoattack range, for example).
was a bit too strong. She's actually getting changes on the PBE that, in addition to reverting her recent movement speed nerf, are giving her better AD and mana regen, though her health per level is getting slashed. Her main issue was that her poke pattern in lane didn't give her opponents that much of an opportunity to attack her, so the purpose of her recent changes was first to curb her poke (hence the nerf to her Q Powerchord, which was objectively a bit too strong), and then make her more vulnerable overall, which started out as a movement speed nerf but is reverted in exchange for a health nerf and better regen/AD (Sona's going to end up being the squishiest champion in the game, and that's fine because she's always been a squishy caster support).
