Isn't Vegas dodgers territory?
There is no reason to have it in hd full time. All other games are duplicated on another channel that is available to all the same subs that would be allowed to get those games in hd full time already.
I think it is also Padres territory. And for San Diego residents, there is a reason to have it full-time. FS San Diego does have exclusive programming (albeit very little) that we can't see. Like the Padres season preview show and Padres game replays.