The one feature from FL Studio that really stood out to me. I've considered switching to FL solely for this feature but Ableton is just a tad more seductive

In addition to the ability of changing the global key of a song, changing the precise tuning in cents (ct) would be a serious game changer as I tend to manually record songs in alternative tunings (such as 444 hz and 432 hz)
Note: Another cool related feature would be a midi effect similar to the pitch effect but more precise (integrating cents, or a constant non-variable pitch bend in order to achieve manual tuning of vst instruments which do not inherently offer a tuning knob)
Thank you for your consideration and I look forward to seeing this in the future!
-PANDA