Once you get the Shadow's Edge, you will drop a bunch of the expertise that you don't need which will be good, not to mention your dps will go way up from the dmg increase on the weapon itself.
It will also boost your armor pen slightly which will let you switch one of your armor pen gems to str. You are also a little over hit and could afford to change out your ranged weapon for one without hit.
I'd definitely say once you pick up the Shadow's Edge you will be looking much better. Biggest thing is to lower that expertise.
If you have access to ulduar 10 hard modes you could also try picking up a MR to replace the scorpion trinket. It's a bit better because its uptime is higher