I don't know if I am late to the party but I noticed that 2H knocks down on counter hit. If you hit Potemkin out of his Hammer Fall the second hit will counter hit him and you can combo him with the right spacing.
(CH Potemkin's Hammer Fall w/ second hit of 2H) 5k>c.S>2S>hj.S>j.H>j.D>2S>j.H>j.D>Bomber (176)
I guess it would work on other characters too if there RISC meter is high enough though.