if i really wanted a compact and solid powerful camera.
i would go to OM-D from olympus. Not for an old sensor wrapped in new shell.
Most power comes here from the lens selection, which BTW makes it no pocketable anymore.
Let me re-quote myself:
If they were to front up with a decent, discreet EVF and a small triplet like the Perar below, I'd actually, surprising to myself, consider this.
If we had a couple of really simple lens designs, even if only manual focus, I think this could still be considered pocketable. The OM-D body is much larger (if it was full-frame, I'd forgive them).
I personally don't mind carrying around large cameras, as I still use medium format film, but it would be a handy addition if everything was "right."