Actually, I would be fine without changes to Crit ADCs in Preseason...

... mostly because the way runes will work after the preseason mean that many Crit ADCs who are weaker in lane can opt into the resolve tree finally for hard lanes. I can't speak for other classes of champions, but I do feel like just having the freedom of the picking any tree as a secondary or even as a primary without fear of losing damage is really helpful to many of the ADCs that currently struggle to survive botlane.

Revitalize + Boneplating, for example, on Tristana(who since the range nerfs really struggles to not get poked out by literally anyone) is now a feasible option for her to allow her to survive lane.

So yeah, don't buff crit ADCs. Just don't nerf the resolve tree out from under them either.