John, I have an A6000 as well as my A900's, and have also used an A99 for a short time (~15 minutes).
While I like the fact that I can see the effect of exposure compensation, etc in the EVF of the A6000, I still prefer the A900 as I feel more 'connected' with the scene using the OVF vs the EVF - it's difficult to describe precisely, but I am still aware that I am looking at a screen with the A6000 (and when I tried the A99 and previously A77).
It's partly the ergonomics of the A900 - but I find it no more distracting to move the A900 away from my eye to adjust WB, ISO, etc. than I do to use the buttons on the A6000 and change things while looking through the viewfinder - I'm still switching from looking at the screen to looking at the settings.
I am hoping that the higher resolution screen on the A99II will help make it seem more 'real', and the advantages of the higher resolution (more capability to crop), higher ISO (the only real weakness of the A900) and articulated screen (I use this only occasionally on my A6000, but it has much more limited articulation) will outweigh and feelign of 'disconnection'.
Note: I have focus peaking / highlights switched OFF on my A6000, as I didn't get on with it - it's another thing that a higher resolution EVF may cure.