If it really is a TES MMO, I'm going to try to do everything by myself. That's how I've played previous TES games, and that's how I'll play this. Sure, I might play with some friends, but I'm not going to be joining whatever the TES equivalent will be of a Party or Raid. I'll treat it just like any normal single player TES game, except that it has a lot more NPCs.
The problem with that, of course, is that if it's an MMO, it's inevitably going to be designed so that the most interesting content (ie: major plot points/story/lore stuff) is only accessable to those people who do group up, do cooperate with one another, and have the time to devote to it. Like any other MMO it will require servers and customer support staff and all that other stuff to be on hand all the time; this leads to constant expense for the developers, which means they'll most liekly require some manner of subscription. . . a subscription based game can only be effective if it creates a sort of carrot-on-a-stick approach for the subscribers to keep them playing and subscribing for a long period of time.
Making it accessable to the loner doesn't really fit this mold unless you want all the content to scale to the character; in which case there is no point in developing an MMO because then everyone would probably just solo anyhow because it's more time-efficient than organizing groups and raids. May as well just make a single player game which doesn't have all the additional expenditures which come with an MMO. And again, you also run into the balance issue and limited freedoms.