Much of the Ishgard community - although not its entirety, which is completely fine and I don't believe there were any major problems - roleplayed throughout 3.0 as taking place before all of the major developments and revelations made in the second half of the expansion's main story. For Stormblood, I'm expecting most people to act as if the war is beginning (and accept any developments required to go to Kugane, which I'm convinced is going to be a major RP hub) but ignore most of the inevitable conclusions of the storyline until the next patch.
I'm pessimistic about red mage being an "accessible" profession as far as jobs do, seeing that both white magic and black magic are made basically impossible to RP in the public eye. That said, my attitude would be that it always has been a distinct school of magic that the right kind of person could discover and use, but it's been so hidden that only a certain cabal or secret society has played it. That doesn't stop anyone from playing a character that's used red magic this whole time, but I'd imagine it'd require some additional backstory linking them with said organization.
I'm pessimistic about red mage being an "accessible" profession as far as jobs do, seeing that both white magic and black magic are made basically impossible to RP in the public eye. That said, my attitude would be that it always has been a distinct school of magic that the right kind of person could discover and use, but it's been so hidden that only a certain cabal or secret society has played it. That doesn't stop anyone from playing a character that's used red magic this whole time, but I'd imagine it'd require some additional backstory linking them with said organization.