I've said it several times before and I'm going to say it again: Picard's synth body could be a legitimate exploration of a concept that is already well known in sci-fi, and has been already touched upon in Star Trek: just look at how Data was granted personhood specifically because we are incapable of determining whether he has a soul and a consciousness or not. If it walks like Jean-Luc Picard, talks like Jean-Luc Picard and is even the only instance of Jean-Luc Picard in existence, then why would people deny him his identity as Jean-Luc Picard, especially when Q himself treated him as the real deal? If we cannot tell the difference, then it's pointless to make one.
So yeah, it's been my opinion ever since Picard's resurrection was first discussed and I'll keep saying it: his synth body would be universally accepted as a continuation of the original Picard, the continuity of his consciousness and the entire cast and the narrative treating him as Picard would be universally accepted as evidence for it, if only the showrunners were called Rick Berman and Brannon Braga.