Here are my thoughts (I am not a big raider).

I like the direction they took for the raiju skills. Contrary to some players, I never felt Forked+Fleeting like a natural combo, regarding gameplay and visual animation. Fleeting should be our finisher and that works better like that in 6.05 instead of 6.0, whereas Forked should be used whenever we need to gap close (better and easier to use than Shukuchi, even if the latter is still useful) independently of Fleeting.

However, if I like being able to vary between Forked+Forked, Forked+Fleeting, Fleeting+Forked or Fleeting+Fleeting, Fleeting can be in theory removed from the bar which is strange. They should (and I thin they will do it one day) improve slightly Fleeting potency to justify its use without punishing too much multiple use of Forked gap closer.

Raiju frequency is better in 6.05 that it was in 6.0 where I was almost the feeling that ninja was raiju.

Some players didn't like ninja since they felt bored between trick attack windows. I can understand that even if I disagree. The combo buff window busy + softer downtime while preparing for next buff window was a good equilibrium compared to other DPS jobs. Now, we have slightly more ressource management with Raiju and Kamatachi which makes us a little more busy while still being accessible to new players (ninja is not often played compared to the other DPS jobs).

Ninja is more flexible and versatile than ever and that is good since it is one of his identity and one the main reason I like ninja.

Can someone explain to me the reason of the 5 free ninki from Kamaitachi when used outside Bunshin ? If I think I understand they add this to make us use it under TA even when Bunshin is not available, it is generally, if I am not wrong, depending on the team and their burst window alignment, a DPS loss if we use it under TA and Bunshin when both are aligned, since we lose this free 5 ninki we could have if we use Kamaitachi outside Bunshin : Kamaitachi potency buffed by TA < kamaitachi potency not buffed by TA + 5 free ninki (40 potency if we use Bhavacakra).

Except this free 5 ninki i am not sure to understand right now (maybe just a problem of Kamaitachi potency as mentioned above), I like the current version of the ninja.
However, my perfect ninja would be a smoother TA window (too tight), a 70s fuuton , a more consistent ninki management (as mentioned in messages above) and a come back of a DoT single target skill (Shadow Fang or even better a new ninjutsu, maybe this in 7.0).