Do note that the picture shows 6D to be a super jump, not just a regular command dash.
You need to have 200% EXS and in veil-off mode (call it V.O?) to activate your "infinite worth". Heck, even the text there pokes fun whether WAASU means "worth" or not. And they tell you not to tsukkomi them. But I'm guessing it's got something to do with the Inverse and Rebirth theme they got running in the story.
Throws are A+D. Still borrowed from Melty.
EDIT: Combos seem to do less damage here. In the first picture, Hyde does a 12 hit combo which nets just 2.8k, even with using that Vorpal thing. It's not to say that their total health is low either; the picture shows roughly less than a quarter of Linne's health gone, and 2.8k x 4 = about 11k like Melty. I hope it's just a demo picture for show and doesn't reflect actual gameplay.
Elements of the fight seem to go over the life bars, timer and damage indicator. We can see Hyde's sprite and his attack sprite go over the timer and Linne's health bar, and his Infinite Worth go over the combo damage numbers. Wonder if this will be an exploit for Waldstein...