From "Morrowind To Skyrim" is probably more to reference the games than the actual provinces. It is to catch the attention of non-hardcore TES players who would have heard the names Morrowind and Skyrim, but if you said Blackmarsh, High Rock, or Tamriel to them then they wouldn't have had a clue. But it is still silly.
The MMO is a response to the amount of people who have been asking for multi player in Elder Scrolls since Morrowind's days. Developing a single player game is different from developing a multi player game, and they would not want it to be some glitchy, gimmicky, work-around thrown in at the last minute. When the MMO was announced many people were excited for it, however once we all saw how terrible it is we all started rejecting it. Technically speaking they are giving us what we asked for, but it is not what we wanted.
Another thing is that this game is being developed by a completely separate group of people than those who have made all of the previous TES games, which is probably why styles, game mechanics, and lore are so messed up. The game is being made by ZeniMax Online, not Bethesda Studios. What's the difference?
Well ZeniMax Media (the mother company) owns both Bethesda Softworks (Bethesda Studios lives inside here) as well as ZeniMax Online Studios (the people making the MMO). Bethesda makes AAA console-oriented titles, and ZeniMax Online makes MMOGs. Because they are all inside the same corporate structure, they share IP and because the offices are only about an hour apart, they can work closely with Bethesda's staff.
So Bethesda is not making this game, but ZeniMax Online occasionally eats lunch with them.
"But Bethesda is the publisher, so they are working on it!"
Being the publisher means that Bethesda distributes the game when it's finished. They get the discs manufactured, shipped out to stores, and handle whatever it is they have to do to get it on Steam. They're really not part of the game's development.
