Hwa and Terry's D flip kick moves all are not real links. Any invincible DP, super, or the like will blow it open. The df+B slide into D Dragon Tail? You don't need an EX DP. Andy, Terry, Joe, Ryo, Mr. Karate, Yuri, Leona, EX Iori, Kyo, and anyone else that has an invincible DP can hit Hwa. The timing is right when the move becomes active (when the purple wave appears). You DP at the right time, you hit him out of it.
Terry has the same issue since it's not a real link. You want to force people to block low long enough to block it low if you want it to be a frame trap. I'm not sure if Hwa has a cancellable sweep, but that would help. Terry does have that so that encourages opponents to block low.