In the past, FSU/Clemson/GAtech were supposed to be blocked by a veto agreement between FLA, SC, & Georgia who wanted to be the only team in their states. Not sure if 3 schools is still enough to veto with the added members; but those schools likely don't have the $ value to the SEC as they already own the market in their respective states, suspect they would rather have some new markets like NC & VA.
In last round, there were plenty of rumors of FSU wanting to go to the B1G, which I expect were true. I think FSU is interesting because Florida would be huge add, but the academic fit isn't there.