My biggest gripe with G.I. Joe is that the ninja characters are in a constant state of god-mode, it seems. All the other characters feel superfluous as soon as Snake Eyes shows up, and it's beginning to wear extremely thin with me already.
That, plus the fact that my favorite Joe, Lady Jaye, has been relegated to a guest-star thus far in the series. I want to see her hurling some javelins, darn it! I hope the format expands to a more JLU-like state in the future, where the cast is more of a rotation than it currently stands.