Great top. Long arm quilting would be a great idea. I'm thinking it's so heavy because by looking at the back side of it, it seems like your seam allowances are about 1/2"? Or maybe I'm not seeing it correctly. Typically 1/4" is used for less bulk and weight. I would imagine you could slowly press it and use lots of starch to give it body and then sandwich it.
I hope you pick something more difficult for your next one. LOL!!