Good to see there's a thread like this. Are actual staff members of Elektron reading this posts?
Anyway, I'd like to give +1 on the following features, ranked by importance to me:
1) Individual time signatures for each track in advanced mode. I initially thought the A4 was already capable of this, since I read the octatrack can do it. Would be of great help, since chaining patterns as a workaround would break certain polyrhythmic patterns.
2) A possibility to take a snapshot of patterns that one can revert to when manipulating patterns live. Current workaround would be to copy patterns from one bank to another but it's tedious and redundant. Sysex backup and restore isn't an option since I like to go on tour without my computer.
3) Ability to turn off Autosave on patterns. I know this is contra Elektrons philosophy but would solve issue 2
But I guess it would break working live on Pattern Chains.
4) Copy and paste for sounds in a kit
5) Copy/clone to new for patterns as described above. This would bridge the gap introduced when creating pattern variations live. Could be done like the save kit menu, with the posibillity to select a destination.
6) Keyboard Tracking for LFOs