The grind for flying these days isn't my cup of tea. I don't like it. On the other hand, i'm also not too interested in flying, because its boooooooooooooooooring as fuck.
So i prefer the system from the past or a less grindy pathfinder system. But what i want more, is flying becoming more interesting. The World of Warcraft has a lot of flying, dangerous critters around. And the weather should also play a role. A combat system for flying mounts would be nice. Giving mounts a few abilities, based on what they are. Means a gryphon has other abilities compared to a pteranodon. A black dragon mount has different abilities than a red dragon mount. Just flying around while nothing happens or could happen to me is a concept i can't get behind.