Perfectly happy with my now 14,000+ shutter count K-3 picked up in 2014. Try to balance body purchases against lens and key accessory acquisitions, keeping my processing software up-to-date, etc., so there is limited wriggle room even within my humble photo budget.
But, yes, if Ricoh came up with a more-than-incremental-upgrade APS-C flagship, I would certainly be tempted to buy it. Would expect it to incorporate recent technologies like pixel shift (pretty much standard by now) and, even more importantly, focus stacking (as debuted in the KP). Better high-ISO without losing grip on low-ISO image quality, an upgraded AF module, and white balance improvements should be a given. And, please, no compromises on ergonomics. A flagship model must be simply the best throw-anything-at-me photographic tool it can possibly be in its line, and not a hipster object.
Just hope that they won't make it so expensive as to put it out of my reach. As would be the case for any new body that would retail for more than, say, 1,200 or 1,300 euros. The K-7 and K-3 both stayed well below that personal crunch point, but those days may well be over ...
At any rate, I'm rarely among the first adopters of new models, both for budget and refusal-to-be-a-beta tester reasons.