I dont know how to word the title so I will just let you know what I mean.
For the leveling I would like to see wow dropped down to 40 levels. You would level 30 on regular azaroth and for the next 10 levels you can choose the area from any of the expansions so you wouldnt have to go through all of the expansion zones and the levels stay maxed out at 40, every expansion would just add a new place to go to at 30. I dont think it would be to hard with the number crunch that will be coming up in WOD.
For mounts at 10 you get basic riding, at 20 you get epic riding, at 30 you get flying and what ever expansion content you want to level through and at 40 you get epic flying. In response to the flying I would like to see flight points replaced with portals which go to the same locations the fp's go to. I feel it would take less time I wouldnt have to deal with giving change at every fp I come across when using the fp and it would validate flying.
For gear you would get basic quest gear till you get to 40 then from there you get basic looking or blank looking stat gear set that you get with the tokens you get from its general instance. Example you get normal dungeon stat set from normal dungeons heroic set from heroic dungeons, the different difficulty raid set from the raid difficulty it comes from. Same with pvp sets from honor and conquest set from arenas and rbg's. All the gear style sets would be transmog, like grievous gladiator or tier 14 wouldn't have stats. There would be no looking to replace your gear with better gear(unless of course you have the honor or dungeon sets) and I feel it would make balancing easier. Yes this would remove being able to solo old raids but I think the hard core raiders might not have a problem with that.
Yes I know Blizz would probably have to make a completely new game from ground up but that is what I would like to see out of wow, what would you like? Maybe you have a better idea of what you would like to see wow change to.