We boarded the Wonder the very day you wrote this message and 5132 was our stateroom. We loved this room configuration and thought the Verandah itself was really nice. I didn't miss the full glass verandah at all.
The one thing we did notice about this room, and maybe because it is aft, is it is noisier than staterooms I've had on other ships that are mid ship. When I say noisier, I mean the room itself - it tended to creak and crack. I commented to my husband that I felt like I was in a bowl of rice krispies - snap crackle and pop. It was rough the first night so needless to say noisier that night, but even on calmer sees, I could hear creaking. it didn't bother my son or husband at all and once I put ear plugs in, I slept fine. I must admit I am a light sleeper though.
I've not read this in any other postings regarding navigator's verandahs but do want to mention it as it was something I wasn't expecting.