A fps increase is a given - the K-1's mechanics are good for at least 6.5fps, and it's limited by the sensor (+ accelerator on the K-1 II). Which I expect to change in the next model.
I hope they'll increase the buffer, too. A faster buffer clearing speed is also expected - even the tiny GR III can write at double the K-1's speed.
I try not to raise my expectations unreasonably high, but it's difficult
You're welcome... there is fake enthusiasm (like a certain YouTube reviewer's) and then there's genuine enthusiasm...