Nope. Absolutely not. That would be a downright terrible idea. Just awful.
...I'm not fan of the notion, is what I'm getting at.
The recent controversy with the NBA 2K14 shutdown (and subsequent reactivation) is a perfect example of why server dependent/"always online" game modes should never, ever, replace offline game modes. By all means add an online Dynasty Mode in NBA Live 16, if it's feasible to get it in there this year. But not at the expense of the offline single player modes, which are still popular and should receive considerable attention in Live 16. They should absolutely remain in the game, alongside online modes such as Ultimate Team, Online Dynasty, and Live Run/Online Team Play.