I have a blue lake as well and changed to the speed fins to loosen up. I now only ride my small skim-style Phase 5. Smaller, thinner, much lighter than my 4.9 broadcast and much faster. Not as easy to keep in the pocket as the Blue, but way better than the broadcast.
I would recommend a hybrid board like The Walker Project Composite. They come in different sizes. For you maybe a 5.0, but you can always get in touch with them for better advice. It's a popular board at comps as you can get some air and it spins well.