Thanks guys.
The specs of my rod are stated as power being Medium Stiff and the taper being Fast (action?). It's a G Loomis Pro4x that was basically given to me, and I love it. Being that it's a 6wt and such a nice rod, I'd love to keep using it for all of my fly fishing, seeing as I'd have to really dig into the wallet to buy a more powerful rod that matches its quality that I'm now used to.
Sounds like everyone thinks the half-size line will help. I'm also continually working on my casting technique. Sometimes I have a hard time roll-casting a beaded woolly bugger or a nymph rig with some weight.
Took a guided trip with a Huron guide and that really helped with line control. We worked on casting a wider loop with weighted flies as well as a spey technique to get the line off the water, then roll casting your line out, then fully casting your presentation. I'd say I'm definitely above beginner-status in terms of casting ability but I have a long way to go to be proficient.
I may try a 6.5 line if I find a good price. If that isn't enough I'll consider a 8wt or switch for fall.