I have the the same unit (31BE), IMO the tv is actually in the perfect location it can be used effectively while traveling and is straight across from couch. I have seen other bunk floorplans where they TV is covered by the slide, what where they thinking with kids traveling!?
Anything can be done, but I would worry about slide structure and cost of a large rv window. Just doesn't seem worth it, you can still get views out that side and when camping that side is usually looking at neighbors. Most of the view when driving even for the kids is out the front window and there is a large passenger side window behind couch. I couldn't see a place to effectively mount a TV from the ceiling and still use while traveling, also routing new power and antenna will be tough work through foam core ceiling.
31BE is a great coach, perfect size while still having bunks, Almost bought the ACE 30.2 then the 31BE came out, much more basement storage, higher floor with no step up to drivers area, generally better quality than the ACE.
2016 Winnebago Vista 31be - Blue Ox Rear Track Bar - Centramatic Wheel balancers
2016 Jeep Wrangler Unlimited Rubicon Toad - Readybrute Elite Towbar