Helix Stadium has been released and it seems that the time has come for a new JTV guitars.
1) Switching to some modern tremolo system(tremolo by Tremoline or something like that) would be nice. You can't switch on your own because of the piezos.
2) Adding a killswitch would be great. Maybe a new volume knob with a killswitch button would work.
3) Current tone knob is pretty sloppy. I can't turn it on with the first try in 35% of all of the cases. So maybe a knob with a button on top would be better (the same thing goes for point 2)
4) The tone knob has too many(12) positions, so it's hard to switch quickly to the correct tone while playing. having about 6-8 knob positions looks like a better choice for a precise switching. but there should be a better application for the configuration where you can set the tone for a knob+switch from a preset library.
5) Helix Stadium has a wireless connection, so implementing wireless guitar tone switching seems to be a perfect choice for a new guitar. yep, there is a small delay, but it might work.
And maybe some knobs and switch repositioning...