I'd really fancy they cleared all of our follower's gear, mailed it to us, and made them share! So you don't have to take off your best weapons/gems for followers, or reequip them for every character. Ability choices could still be remembered per-char. basis, though.
One other idea I had would be to cause strength, dexterity, and intelligence to all equally benefit followers, by converting it at a 1:1 ratio to another stat, follower-exclusive, which behaves in the same manner.
Would certainly make it a lot easier to gear followers since they all use essentially the same non-weapon items.
I'd like to see the Asheara 4p bonus made passive rather than a 50% uptime buff.
So the effective removal of non-orange and off-class drops from the game is coincidental then.
So basically this wishlist is "Remove items that are non-ancient non-legendary and non-smart from the game"