1. Doesn't look anything like the DSSV ships, don't think it's parts would mesh well.
2. There's already an Excalibur class in the game, it's a LtCmdr level cruiser
3. And in general, I think it's kind of an ugly, ugly ship. It just looks like someone treated a Galaxy class like a Stretch Armstrong. Honestly, I'm glad nothing that fugly made it off the drawing room floor.