I dont think that looks that bad. Mainship had/may still have a bridge extension option for their small 34' Flybridge cruiser.
That's really change the space on that boat. Nice. Is that an after market option? The concept seems simple, but if custom molds and plugs are needed, then it could be out of hand cost wise. Also how would you match the paint or glass finish.
ACY did a top deck extension on a Knight & Carver. It was in their news letter with pictures. You may have to dig around on their site for it. It was a few issues back if I recall. It looked nice but also fairly involved with a lot of labor.
here is a 60 hatt with a slightly smaller flybridge extension, whereby they were able to increase the size of the enclosed bridge and create a small aft deck lounge