Should there be any abilities that have longer cooldowns if they're used really well?
What I mean is something similar to Li-Li's Jug of 1,000 Cups:
Jug of 1,000 Cups Channel for up to 6 seconds. Every 0.25 seconds, heal the lowest Health nearby allied Hero for X Health and increase the cooldown of Jug of 1,000 Cups by 2 seconds, up to 50. Base cooldown is 20 seconds.
Basically, if Li-Li makes optimal use of this ultimate and heals a lot of HP, the cooldown will be longer, but if she uses it and only heals a little bit (or gets interrupted), the cooldown is shorter. Pretty interesting design, IMO.
Most abilities that get their cooldown affected via optimal use end up getting it reduced (or get a full refresh), but I don't think there's any ultimate that has its cooldown become longer if used properly. Could this be something to explore, or would it be anti-design in Riot's eyes?