I've been in martial arts for longer than I care to talk about, and my take on DA was that fights were hit and miss. Some were simple karate & wirework, some appeared to be more advanced ju-jitsu & rudimentary kung-fu.
The fights in the pilot, Rising, & Pollo Loco stand out as really excellent ones in season 1 for me. In season 2, Harbor lights and Freak Nation.
Designate This had some bad ones, yeah, but good fights in DA were a bonus to me; I watched it for the characters and story.
They used to say one nuclear bomb can ruin your whole day...