I think you are fine.
Wheras I understand your quest for the best sound possible, the respective manufacturers have already covered most of your conscerns except for, perhaps, changing reverb or eq if you drastically change your venue.

I would let your ears be the judge by walking around before a performance with a style playing, realizing that reverb will be soaked up when the audience is seated.

I use any of my KN pianos with the Compact without a problem. The mono issue with Bose started with Yamaha stereo pianos that, for some reason, do not sum to mono very well.

I would relax and enjoy your equipment, and not be too worried by these small issues that change very little. We are are own worst critic, and you can bet that your audience won't care a wit about them because they they won't know the difference.

Bernie