I guess I can foresee Kenshi doing very well in some tourney ..... he has some good tools to act as a strong zoner, and, even make anti-zoning game when pressured ..........
Skarlet has good potential, she is the fastest of all DLCs so far (don't know if Freddy can matches Skarlet's speed ..... let's see)
Rain is fun and is being explored yet ..... I like him, I hope people do well with him.
Freddy is a mistery, nobody knows yet what he can be capable of .....