My only intent in asking was maybe there were some subclasses of postmodern architecture I was unaware of?

Certainly not an attempt to patronize.
Philip Johnson PPG Plaza in Pittsburgh is also a Postmodern Gothic Revival building utilizing a "wall of windows" (though it actually is a curtain wall,
@lazyboy97o 
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My point was more in that you can still have a floor to ceiling window in a postmodern building that does not necessarily have a wall of windows or curtain wall. One can still do a punched opening large enough to essentially be floor to ceiling.
The arched glass at the top of Guild House by Venturi:
I'm fine with floor to ceiling windows in hotels, I'm fine with smaller "punched" openings, it all depends on execution.
As far as taking cues from Graves' designs on property to utilize in new hotels on property, I can't say I'm a big fan of doing that. I am personally not a huge fan of Graves' work overall, Swophin notwithstanding. I feel his designs were the most banal and immature of all the big name postmodern architects. Stern, Venturi/Scott Brown, Stirling, Moore, Tschumi, Koolhaus, Gehry, and on and on. He is pretty far down the list. If they want to imitate, there are better places to start.
And I may have misunderstood your post slightly, but yes I do agree that a monolithic slab of glazing is a tough aesthetic to reconcile with the existing Swolphin complex. Not impossible, but difficult.