Maintainability is the problem.
I've had a couple of PH Dragons, a JB1 and a Mohawk. The latter two were fairly simple but I didn't fancy the idea of fixing the Dragon.
By comparison, something like a BSA Ultra is supremely simple to strip and repair and that's what worries me about the Paradigm (not that I believe we'll ever see it), it sounds like a can of technical worms to me.
Not worried about the pumping effort - got muscles.
I actually think the perfect design in terms of pumping and shooting is that developed by FX and used in the Independence, this looks like the best of both worlds to me, even though the gun itself is pig ugly and far too expensive. And that said, I don't know what they're like to strip either....