I've been messing around in the lab with different and more technical options that I haven't thought of, and I'd like to hear what you guys think about these things:
CC U-tilt (It is a bit awkward to preform since you have to hold down the stick then tilt it upward after that. But the thing is that U-tilt comes out very quickly and can start combos, which makes this seems very promising.)
Shield-drop Dair (It is tight to do, but dair could start some combos, or set up for an U-smash, so might be a thing.)
Dair OOS (since you can drift with it a bit, it seems a bit like CF's Stomp OOS, maybe a sneaky OOS option.)
Reverse B-air (It seems like a promising option as a combo tool or a combo finisher.)
Boost OOS (have no clue if this one could be an option, but it might be an escape tool.)
Infinite Boosting, boosting and barely touching the ground to refresh your boosts and immediately boost again. (This seems like a huge thing for ROB. this means that you can literally air dash-dance. A lot of stages have platforms that aids this, the only ones lacking of good platforms are like FD and SV.)
Platform Camp (It might be really good in certain MUs, llike Kirby, Jiggs and IC. Staying on the platforms, lasering and throwing some gyros, and boosting around and at time come down with a boost-nair.)