The only reason anyone suggests this at all is because they previously did it, and they only previously did it because ff14 was a total disaster and they were desperate to try get any ff11 players to move to it. It will never be done again, on this game or any of their others because ff14 doesn't need more players and ff11 will shut down if it loses its core players.
Also, they are totally separate projects unlike wow/wowclass
Obviously some do, I'm talking about in the majority of both playerbases. These games are chalk and cheese.This is an assumption with no basis. I play both, I love both. I know other people that do. Then there's the players that stopped playing FFXI to play FFXIV, who clearly don't think it's "awful" or they wouldn't have done that. You thinking FFXIV is awful does not mean you represent all or most FFXI players on the subject.
I wrote a big list of reasons why most 11 players do not like 14 but it will just annoy people so I edited it out. Lets just say there are real reasons most 11 players have tried 14 and come back to 11. There is almost nobody I have met that has not played 14 on 11.
This is not an untapped market, we don't like it.