I have to strongly agree with this---I had high hopes for this bringing back at least revisions to the older techniques/styles even if that would've raised more questions as to why nothing came of them earlier. I mean, hell, they've already gone well beyond at this point with having Master Roshi actually actively entering the fray which runs counter to everything from even pretty well back to the days of the original Dragon Ball!
Tien's Solar Flare, Kuririn's Destructo Disc, Yamcha's Wolf Fang Fist, The Occult angle from the whole Majin/Deboora arc---plus any number of things from the original and Z that just make sense, even for this show. They could've at least had the decency to flip us off by having Roshi bring the good old Power Pole and Yajirobe's crazy katana for his own use in the brawl since obviously his mundane staff wasn't going to amount to much.
At the rate they are going, the closest we'll get is Goku getting the idea to do a hyperfocused Kamehameha down to something like a ridiculously destructive laser pointer with the latest emphasis on crazy ki control---less to animate as well~