Thunderbolt 3 was pretty cool. The adaptation is pretty close to the manga but they cut some scenes which I really liked. They completely excluded Balls from the battle in the big battle for example, and there was a pretty cool scene with a Ball in the manga... >_<
It's interesting to compare the Psycho Zaku vs Fleet scene in Thunderbolt 3 with the Char Zaku vs Fleet scene at the start of Origin 1. One is 2D, one is CG, both are similar in concept. The CG one in Origin definitely benefits from more dynamic camerawork and more debris detail in general, but it's pretty cool to see a 2D Zaku do super fast evasive maneuvers and stuff too.
Interestingly enough. Hajime Katoki storyboarded Thunderbolt 3. He stuck pretty close to the manga panels though, so it wasn't that unique, but it's cool that he's doing a bit more directing-level stuff at Sunrise these days.