You lack a true #1 WR, though you have 3 startable WR pieces at least in Colston, Garcon and Shorts, plus a high upside guy in Wright.
You also shouldn't have taken Luck in Rd. 4 regardless of who was off the board at QB (he's fine as a starter, you can just get him much later), and you're weak at TE too.
All of that said, Martin plus McCoy plus Forte is absolutely BEASTLY at RB, and even Ryan Mathews could be a decent FLEX play if he can stay healthy, so my take is that you'll have trading chips to work with should any of your weaknesses become significant enough that you have to fix them. I'd figure out which team in your league has the worst RB situation, wait till the bye weeks start, and milk him for all its worth.