Agree with almost all of the above-stated concerns. Just wanted to add that it's incredibly strange job design given that it flies in the face of everything SE is doing with the rest of the jobs' gap-closers. All are either having their potency removed or given charges (i.e. spineshatter dive) in order to not make players forced to choose between using their gap closer for potency or for movement, as well as removing the need to hold them in cases of needing to stay max melee for a mechanic.
Then Ninja gets not one, but two gap closers that it is ostensibly forced to use immediately regardless of mechanics or simply lose them, and cannot use anything aside from a non-raiton ninjutsu after using raiton otherwise they are simply lost.
And on TOP of that, these gap closers are on the GCD, giving literally zero flexibility in terms of timing for when to use them. This design feels entirely antithetical to the rest of the philosophy for job changes in EW.
This could all be very easily solved, however. Simply removing the restriction that weaponskills break this combo would be the easiest fix. Ideally, in my opinion at least, one or both of them should be made OGCDs. Not only does this remove the insane restriction placed on using them in their current iteration, but would actually give interesting mobility choices and allow ninjas to have a proper gap closer that takes us to the boss instead of shukuchi with a target macro that takes us dead center like we currently have. Not only would this make the job more interesting and (again, in my opinion) more fun to play, it would actually fit the stated design philosophy for Endwalker.
I, like the others in this thread, was planning on maining Ninja through the new expansion, and am now, unfortunately, strongly considering completely abandoning my favorite job in the game on release if these job changes persist into the expansion launch.