Boy, one just can't get away with commenting one song anymore!

Is that a sign of an overflowing market?
I'll steal Doug's very organized lineup:
Action Swing - Yep, PP, I agree! Very clear identity, I think. No use holding this back.
Dark Theme - The harmonica seem out of place, I think..?? (Sorry, just kidding you

). I think the orchestra sound way too much in your face here. Mix the violin down (try to hide the synthy sound in the orchestra). Give it some mix-reverb, maybe automate the strings a little with the modwheel, and go easy on the limiter on the master bus (use a good compressor in stead).
Hero Theme - I think this has a little of the same issues as "Dark Theme" IMO, but maybe not as obvious. I like the composition, but maybe a little on the soft side to be 'hero' like? I think more like 'anticipating something good', but that's all in my mind
Med Music - Not sure about the med association, it sounds a little too dark for corporate IMO more documentary, but hey Im no expert. Sounds tight and ready, though.
Tension - Here you got the strings just right, sounds fine IMO. It sounds like it works due to the editing points, despite the tempo change, so the music supervisor will be able to use both. Nice!
The Battleroom - Sounds like it comes right from a scene. Is that a good thing? Probably.. strings sounded better here, but then again, you didn't feature a solo instrument. The once you did (with the orch. brass), I noticed it.
Overall, you seem to have a great hold of your genres, and your compositions and arrangements are just awesome! I think you could work more on the mixes for those with orchestral elements.. on the shortcomings of the samples. You seem to want to feature a lot of orchestral stuff, and to be honest, I don't think your samples can keep up with your skillz, so a choice is to spend little more time mixing.. or upgrade, I'd say
GL