Dollhouse was cancelled because of low ratings, not because of anything Eliza did.
Well, low ratings can be caused by viewers failure to engage with characters and story, which is/can be a combination of writing and acting. So for a lot of people it may very well have been a failure to enjoy Eliza's performance that turned them off the show.
...they wouldn't have been cancelled? So therefore you're saying that she is the reason they were cancelled. 😛
Man, you would've thought somebody would've blamed Eliza before now for this obvious pattern. I mean, didn't Joss and Tim Minear want to give Eliza a Faith spin-off because of what a great character she was? Fools! Because it apprently never would've worked.
Also Ringer and The Crazy Ones was cancelled after one season because of Sarah Michelle Gellar doncha know.
Ok, firstly, this is a bit snarky...
Secondly this "obvious pattern" has been discussed before as far as I know. Not everyone thinks Eliza did an amazing job as either Faith, Tru or Echo. Please respect that.
As for Ringer and The Crazy Ones I'm going to reiterate my previous statement. Poor writing and acting, or at least a failure to connect with audiences, can be the cause of a show failing and both writers and actors can be the cause of people failing to follow a show. I for example love SMG, but I thought that Ringer was a
terrible show, unwatchable, and that it was painful to see her in it. So I stopped watching it. I'm obviously not saying that me not watching it brough the show down, but the fact that it failed might be because other people felt similarly. One could blame quality and storytelling, but at the very least one could also argue that SMG wasn't good enough to keep a fan like me around...
As for an "Angel and Faith" show... I'm not sure. I feel like it would work now, when they have more of a bond, but at the end of Buffy season 3 it wouldn't have worked. And I can't imagine it would've worked later for the same reason that "Buffy & Faith: the vampire slayers" wouldn't have happened... it's a demotion for the lead character/actor. I'm not sure DB would have been too keen on that. It's like saying that
Angel couldn't make it on his own.
So short answer; it would work as a show now, I don't think it would've worked then.