The only downside I see to your mods is that storage loss (though you gained a bit back above the dinette) and the fact somebody gets that inside space on the bed
Quite true and we thought long about that. But Carrie voted absolutely 'no' to twin beds so she gets to crawl over

. The storage loss was a factor we were concerned about. The shirt closet does not seem to be an issue, the wardrobe in the bathroom is plenty big enough and Carrie already claimed the existing shirt closet for kitchen stuff anyway.
The under bed storage is more of a concern, but we never had it, so will not miss it. We spend two weeks in the rig and had empty storage space. Of course 'stuff' expands to fill all available space so we shall see.
I forgot to ask, does that dinette make into a single bed?
It does not. They asked if we wanted it that way but the table would have to have been made smaller than I wanted so we said no. We do have the full sofa up front so she can sleep there.
What brand pure sine wave inverter did you go with?
It is the Xantrex that PC offers. The model is "Freedom Xi". I have not even read the manual on it yet, but seems to work just fine.