Something I always tell my employees - don't come to me with a complaint unless you have a solution to suggest along with it. So, how would you propose a single-button menu system to work?
User error. Smart user learns to not check his watch while in the menu. Problem solved.
The Radius is a box mod; the P3/Procyon is a tube mod. The Radius has 3 buttons. Back to the question above.
True, ProVape makes very high quality mods - arguably the best. But, why are you ruling out a 200W mod? You don't have to use 200W just because it's there, just like you don't have to drive at 100MPH just because your speedometer shows numbers that high. There are many small, single-battery mods using the DNA200 board, but are limited to 75W (I believe) due to a single battery. There's a new VF model that uses a single 26650 that's quite comfortable to hold as well. Point being, there are a lot of options, and until you design and manufacture your own mod, none will be perfect for you.
Back to the first question again...
Two problems with your idea. First, ProVape would never expose the electronics. Second, allowing tubes to be screwed onto the Procyon would potentially allow people to use P3 tubes and make a tube that accepts something less than an 18650, and with the 50W limit, the whole point was that it's 18650 only.
The programmers are for dealers, not end-users. A vape shop owner can recover that cost very easily.
Regarding "at the time", what you and a couple others here seem to be missing is that the Procyon is an evolution of the P3, not an evolution of the Radius - two different product lines. I doubt the Procyon would have existed if ProVape couldn't have used existing parts and tooling from the P3, as there won't be as much return on investment for a tube mod in the day and age of the box mod.