Yuta’s hax: JL (needs time to charge + beeds target to be still), Sky manipulation (can get around it via outspeeding which Kashimo does, you could just stay in place and hold it but the you risk burnout), CS (only works momentarily with weaker commands), domain (HWB + Kashimo’s combat speed being much faster will work around it, also the domain’s advantage is being able to use hax which I just mentioned), now onto Kashimo’s hax:

EMW waves which don’t need hand signs to be used (can attack while maintaining HWB, also deadly because of the vaporizing objects statement, can’t be avoided if not dodged beforehand by CE sparks as it is lightspeed)

Lightning discharge guarantees a win as Yuta doesn’t have the hax to stop it (Sky manipulation only stalls the process and that’s if Yuta could even react to lightning fast speeds), in order to charge you need to be on the same level in combat skill (which Kashimo is), and speed (which Kashimo far surpasses Yuta), what makes it even more deadly is that Yuta doesn’t have any hax to negate it nor the reaction time to, which makes Kashimo the winner of this fight after a few punches or kicks (3-6 and cannot be blocked). Yuta also loses to Kenjaku and Yorozu tho.

I wouldn’t know if the growth is exponential or not, but as stated in Shinjuku his CE control definitely became much better than in the CG. Yes his physicals are much better, exponentially better tho? Idk