I have been building Aalto control templates for the last couple of months for live performance. A feature that I would like to see for the sequencer is a tap tempo control. It would help out immensely when I am jamming with other musicians. Currently I use Ableton's Tap tempo feature and set the sequencer to Host, but the sequencer only moves at 16th notes per beat and it would help a lot to be able to change the sequencers timing division relative to the host.
A few other things that people have suggested that I would like to reiterate include: MIDI preset control, 64-bit external input for the reverb, and OSC control.
I love this synth, and people call me an Aalto freak because every time someone mentions plugins I ask them if they have tried Aalto. Still the best $100 I have ever spent on a plugin. Thank you.