If you are up to it you could dump your peep and go with a hind site or no peep type set up. That should get you~ 5 fps.

Removing any string silencers and just going with the string suppressors should gain you a few fps (2-4).

Ditching the WB rest will gain you 2-3 fps.

That places you in the neighborhood of9 fps gained.

Scott and Tru-ball are selling new releases that add some draw length (trigger closer to jaws than before) which should allow one to go to the next size higher cam. If you're shooting a 28 now then you may be able to buy up to a 28.5 with one of those releases. It would be a costly experiment, but should gain you ~ 5 fps.
Combine that with ditching the string loop and shooting off of the string and now you're looking at a 29" cam and a gain of 9-10 fps.

Take that 9 and the 9 above and your looking at 18fps gained.

Not all moves I'd make, but feasable.