Well, since you're asking for opinions...My wish list isn't complicated. All I really want is a reliable device with a heavy duty switch. Mechanical sounds like the way to go. But if the next generation device doesn't use a switch, that's great as long as the thingy that turns it on and off works out of the box, as well as several years down the road.
I'm not rich. Far from it. I don't have a lot of money to spend on every new $100+ PV gizmo that comes out. Some of the folks in this forum seem to collect these gadgets like they are stamps or coins. But when I make that kind of investment, it's with the expectation that the device will work properly for several years, and be something that I can count on. If PS can meet that expectation, I really don't care if it's black or stainless, long or short, has a push button or is lip-activated. Those details are all secondary. I just need my nicotine.
I'm really hoping that PS conquers the Protege switch issue before moving on to the next big thing. And, for customers who took a leap of faith and bought first generation devices and are having switch problems...I'm trusting PS will provide us with whatever they invent to make our sizeable investments worthwhile.