My general wishlist

[RO-mix]

Guys you did a good job. Ableton is already fullfeachured and the sound capabilities are great!
In next releases can you focus on usability,
improve zooming with hotkeys and mouse (features like Zoom ALL, Zoom Selection, Zooming with mouse and key or mousewheel)
improve track zooming and track scrolling speed when dragging up and down
implement region markers to store regions of selection
implement retrospective record feature like in Cubase and Logic

Many professional people made good wishlists. Please support the professional sound engeneers also who like Ableton but miss many workflow improvements.

[JoeOsoDopke]

+1 on these. And, like most people have been saying, more key commands available (at least more relevant ones) or the option to create your own.

[djchanclaface]

Mouse zoom! So many times I have held down option and scroll wheel and forget Live can't do this unlike every other audio app I use. It really slows down the work flow.

For mac users, pinch to zoom. Works great in Logic.