The Elder Scrolls Online, a change in business models can be kind of disturbing. Suddenly the game doesn't behave according to all of the same rules you've been familiar with since launch. To help alleviate that confusion, the ESO dev team hosted a quick question-and-answer session with players over the weekend to help answer some of the major questions about the change, the next major patch, and balance issues moving forward in the game.
To start with, if you've still got time cards for the game on your desk, fret not; you can still use them after the model transition to add the equivalent amount of subscription time to your account. You might want to use them ahead of time, though, since there are plans to add in a special veteran reward for players who stayed subscribed during the game's entire subscription lifespan. DLC prices are not finalized, but they are intended to be around the normal DLC price points for other games. Take a look through the whole of the answers for more details on balancing and issues like controller support.