WTF Taekwondo for MMA?

A lot of UFC fighters have taekwondo, and yes taekwondo would do well. However, WTF does not allow punching to the face, and as a result it often has people who fight with their hands down. This means it won't help you much against punching. I advise ITF over WTF for MMA or real fighting. If you can't, just practice with punching in mind.