Great to have Lush back after this update!
It would be nice if there was an option to link some or all layers' parameters so that moving a fader in L1 would also move it in L2, LX, etc by a similar amount (or scaled value). This would give us some sort of global "performance controls" and would open up a lot of options for using Lush in a live fashion buy automating volume, ADSR, VCO, etc. I don't think it is rare at all to need to adjust cutoff, decay, or release on several layers simultaneously. So having one control which could take the place of several would be worth investing the dev time.
Thanks and keep up the great work! I was super excited for this update as this is one of the most under-appreciated synths IMO.