Speaking of the transport controls, I miss having single frame advance buttons in the transport. Yeah, I can use left and right arrow keys, but sometimes you’re in mouse mode and just want to go a few frames either way without trying to drag the play head to exactly the right spot.
If it were me, I’d add something like <1 and 1> buttons between the Play and Next Keyframe controls. I don’t think horizontal space is too scarce there.