
It depends what is meant by "sandbox element". Too often it is assumed that sandbox games relate solely to PvP, and we have more than enough of that already in ESO. If you mean simply more random NPC encounters then I'm all in favour.
This MMO and questing is sandbox. Start where you want and go where you want. Start at the end if ya like and work backwards. Total freedom. Or are you saying this game should get more sandbox? If so, how do you mean?