Perhaps it's because English isn't my first language but I don't see anywhere in that post where it says SAM is or isn't getting Kaiten back. The slide it's associated with has "PvE adjustments" in it too, so it's not like it's impossible. The only thing I'm reading is that they're saying they're taking in the feedback they got from 6.1 into account and not radically reworking jobs until new expansions, which is a good thing IMO? Jobs shouldn't be messed with radically during an expansion unless they're in awful states, but also on the flipside this means more of "don't like what they did to the job? Wait until 7.0/8.0/9.0..." but given the fact that they mentioned 6.1 specifically, it does seem clear they understand that their changes to SAM/NIN have pissed off a lot of people, so there's that.