Caitlyn Ult Change
Personally, I think Cait's ult needs a bit of a rework to make it more appealing thematically and up its gameplay use.
If you ask me, it should work like this:
Caitlyn aims her sniper rifle at her target, lining up the perfect shot for 1 second to deal B damage. The longer she aims, the more damage she does, increasing by C%(or flat amount) for every D seconds, up to a max of F seconds for a total amount of damage of G. If it hits anyone other than the intended target, it strikes for B damage.
Certainly would make her feel more like a sniper and give a bit of thought to how to you want to use your ultimate. That guy is running with 10 hp? Use the minimum casting time and blast him down. That guy is running with more HP than the minimum casting time would take off? Line up a better shot at the risk of a teammate blocking it. Obviously if it kept its original base damage and scaled up it would be overpowered, so the minimum damage should be lower than it is currently but potentially be higher than it is currently if aimed long enough.