Bar a helicopter landing in the back garden over the next few weeks direct from Pentax HQ carrying gold plated cameras and lenses for my free personal use, and a hand written apology from the CEO of Pentax, I'm pretty much done with Pentax
Leaving aside my own recent feelings for the company (which are pretty damning in many ways customer service wise) My initial thoughts about Ricoh were mostly positive when they took over Pentax. Recently though I've had many more "doubts" mostly as Ricoh can be a bit "oddball" and whilst they have some good ideas, they can miss obvious points (GRD series no OVF strange to say the least) GXR whilst novel is really the big loser in the entire mirror less market. An idea that might have caught on had it hit the stores 2-3 years before it did, now seems completely at odds with what people might want to buy.
As for mirror less medium format, I really have no idea of the needs of MF users so I'm sure they would have a better idea than I would.
On the possible 35mm FF model I think an optical viewfinder would make more sense. The problem for Pentax is they have very few full frame lenses in the system, that will require quite a lot of work to pull that off mirror or not.
On the size point I simply don't see why that is a focus for the company, the K-x was a bit small for me really quite a compact SLR if there ever was one (too small in hindsight) K-r a little better I was ok with that size wise, K-5 is also smaller than most a bit larger than the K-r. I really don't see where the desire to make these cameras even smaller comes from. I think it's misplaced logic..I def don't go for big monster pro level Canon sized bodies nor would I ever, but too small hurts handling and comfort something the A55 suffered from badly (IMO)