I remember back when people first started flying around on the Headless Horsemans mount how cool it was running on a path of energy. It really fit the mount and lore behind it and made it unique.
NOW... this hovering (with panthers included) has just become such a lazy and crappy way to make mounts fly. It just looks shit and ridiculous, you might as well just let any ground mount fly and say it's "magic".
The saddest part is that it doesn't take much imagination to have turned a lot of these into awesome flying mounts.
Take the new Paladin class mount that just floats in there air. It'd be far nicer as a full on pegasus and would make sense when it's flying.
And the new Warlock mount is a great model, but when it flys it doesn't even have fell energy it just runs in the air. Just imagine if when it took flight it grew some giant demon/dragon like wings - it'd be amaaazing.
Blizzard really need to stop with this now.