I would be watching if I still had Starz. Andy may not have been able to reprise his role, but from what I've seen of the filming of the new season, the cast and crew have very much tried to keep him there in spirit.
Well, from what I know, Andy Whitfield actually gave his approval on Spartacus continuing without him. From what I heard he also okayed the actor who is now in the role (I could very well be wrong, as its what I heard). So, if he was okay with it, especially knowing his health was failing him and he believed in the show, why should anyone else not be okay with it?