How to make Galio viable

I think the biggest problem with Galio is that in order to hit 3+ people with your ult, the majority of the time you have to flash to get to the enemy team. I feel that if his ult was changed to have the mechanics of Aatrox's q, where Galio would fly up and slam on the ground in a targeted area and start his taunt when he hits the ground, that he would be much more viable. The flight time would allow for counter play from the enemy team to flash or use some other form of mobility by giving them warning when they see him fly up and it would eliminate the need to flash to get a decent Galio ult off. What are your thoughts?