It looks great! Only things I would add, and these are game pending, of course, are braces through the center of the bot to enhance frame stability. Either by making cross braces, or by adding braces from motor to motor, since the motors stick out and look like a good place to add reinforcements.

Like I said, of course, this is all game pending. The weight could be used elsewhere, or maybe the game won't require extra reinforcements. Either way, great frame!