I have such a hard time taking the people who complained about it before seriously.
If you died it wasn't because of Raiju...
And it requires melee regardless there is no difference in effect other than making for more weapn skills spam and now you don't have two charges per Raiton so you can't get one in then move out and just charge back in again with a single Raiton cast.
I've done all of the EW content countless times on NIN and I had absolutely zero issues it rly comes across as a totally imagined problem imho.

Ten Chi Jin is the actual problem in this regard, even moreso with random mechanics and people running into you and dropping AoE on your head.
Even just something like micro steps are infuriating with it, if I haven't played NIN in a while and go back I need to adjust and basically remember to always take my fingers completely off WASD and the mouse because if I don't even if I feel like I don't make a click it's like my character takes a micro step that can't even be seen and cancels it...
If people wanna complain about that stuff in regards to mobility, animation locks and being locked in place then Ten Chi Jin is the actual problem, Raiju wasn't an actual problem.