Aye, to be fair I am seeing improvements all the while though, they are definitely taking the game in a better direction.
I would like to see:
1. Bounties becoming more rewarding for time/effort - some bounties are just not fun and don't give much XP when you do complete them. Especially the "go here and kill 150 mobs" ones.
Maybe something extra for doing all 5 acts/all bounties?
2. Bounty rift keys should scale with torment difficulty, or better Point 3 should be made a reality.
3. Rifts should be free to enter. Why make me do bounties to do rifts? if not free then I would like to see a system that would let me do several rifts for every bounty I do.
4. If rifts were free then I would enjoy the game more as grouping would be more fun. Right now if you want to group with 4 people and no one has rift fragments it really sucks.
5. More end game stuff to do, Tiered rifts are a good start. Maybe they could make the story mode more relative again somehow. As things stand there is little reason to ever play the story mode again, even new characters can level up in Adventure mode.
6. I have been thinking about this, and maybe they could make more torment difficulties available? Perhaps they could even have a system whereby you can find better rolled gear in higher torments.
Give a real feeling of progression on gear if you can find items that roll more stats or higher stats on higher torments.
7. They really need to rework the current legendary items in the game a bit, some of them are just not worthwhile to use for any class, ever. Others have no special affixes and really are no better than rares of the same class.
Maybe reduce the number you can find, but make it so that finding one is more likely to give you a worthwhile item to use.
8. Events in rifts. Adding events would make rifts a lot more fun. Cursed chests/shrines are a good start, but I'm sure there can be others added.
9. Mob density should be increased in rifts to be more consistent. Some rifts are just plain boring, others you get swarmed (way more fun

). Likewise some Rift levels can be so boring to play just for the map itself. Spider queen caverns, those caves for example.