The "mobile, social, tablet and online game categories" quote is clipped from a press release, not based directly on the language of the contract (which is sure to spell out in significant details which company gets the rights to which type of games). EA and Disney are the only ones privy to the full text of the contract, so all we have is educated guesswork based on what they've said about it.
The full sentence that the quote comes from
reads: "While EA studios will develop for the core Star Wars gaming audience
, Disney Interactive will focus on delivering new Star Wars games for casual audiences
on mobile, social, tablet, and online gaming platforms."
An MMO doesn't really fit the bill for "causal audiences", and more likely falls under the mandate for EA: "the creation of new high quality Star Wars games aimed at the core gaming audience
and spanning multiple genres for console, PC, mobile, and tablets."