They sold 3 million games in the first weekend. That's a lot of excitement over an SP game. This franchise doesn't need MP to survive.
Indeed.
If a bunch of games try and shoehorn MP in where it doesn't belong, or where it could belong and do it badly, and end up with a substandard MP and substandard SP the games that stick to stellar single player will stand out even more.
The "best" MP games (with emphasis on MP over SP) offer certain things - TES wouldn't be able to offer those things and still be TES. Games with CO-OP or limited MP (so SP is still THE major draw card) offer certain things - TES might be able to work like that but these games are also often less than 30 hours long (where as even the people who complain make "I've played for 100 hours and now I'm bored" threads) - and time spent developing an optional MP function is time taken away from developing an awesome SP experience.
Plus, while I like some MP experiences one of the worst aspects of them can be the people. Hundreds of hours even in a good TES game with some of the specimens that populate the MP population... lobotomize me with a candy cane now.
It's like saying every movie going 3D is inevitable.