Pantheon's Grand Skyfall - Channeling time decreases with each point in skill. (proposed change)

Pantheon is a champion who falls off a cliff late game. His greatest strength, early to mid game was just hit very hard with the nerf to his ultimate.
We can compensate him by lowing the jump and fall time of Grand Skyfall as you put ranks into the skill. Level 1 would remain as it is now, having no affect on his early game. Rank 2 would be a slight decrease in time for the jump and fall. It would be noticeable but nothing too big. Rank 3 would see a large decrease that would let his ultimate function with much greater precision late game when everyone is getting close to maxed out item builds and has defensive items and the capability of one shotting Pantheon if he hasn't built defensively as well.
This change would make Pantheon much more fun to play without giving him any extra power until mid and late game.
It is possible that this buff to his ultimate might require a nerf to it's rank 2 and 3 damage. By rank 3 I would expect you to be able to reliably land the ultimate on someone so lowering its damage may be necessary.