It could. And it's probably what I would do. But if the OP is concerned they aren't getting a rounded MMA toolset, then the best way to ensure that is to go to an MMA gym. Of course, if they're training MT and BJJ at the same place (not sure if that's the case or not), then that place possibly already has an MMA focus - hard to envision those two in the same house without an MMA awareness, at least.If OP is doing well at his bjj and muy thai training, wouldn't it make sense to become proficient at these arts before dropping everything and going to a third gym?