OP here,
I'm 6'3. We think we improved the factory mattress enough so its the space that is the problem. Wife has to close her sliding door to get that extra 1.5 inches to stretch out. We have to leave one bedroom door open or it gets stuffy in there. So yes the bedroom is claustrophobic.
I don't think I have many options here. We think just one of us in the bed would help. So we may try a good quality air mattress for the living area (Twin size) for the wife lol Sounds bad I know, but She's the smaller one .