I am a big S50 fan. Love it's simplicity & performance. I would love to see a new product like S100, but for near term priority I would suggest the following with firmware updates:
1) Improve image acceptance rate by user specified tolerance
2) Digitally, rotate the sensor to get landscape images for wider Dso's.
3) Ability to capture high altitude objects that pass through zenith and perform a meridian flip, if necessary
4) Improve centring algorithm in all modes, deepsky, solar, lunar.
Thanks ZWO for a wonderful product in spite of its limitations.
It is the best "bang for the buck" product in the market for the entry level astro enthused.