Flick left Bayern because he didn't feel supported.
If he fails at Barca, his career is over considering he is 59 now (so 60 midway next season) so I doubt he will take on a project that he feels it isn't going to work at all.
And current Barca is anti Flick too. His game is based on verticality and accepting he will lose the ball a lot even in dangerous positions, but quick defense will stop counter.
We aren't build for that, not without a few signings at least
With that said, my gut feeling is that Laporta still wants him, and if we can do it we will
Some might say that Flicks career is also over if he doesn't move to Barca. So.