Whats wrong or right with here is not really pertinent to trying to strengthen a new community. Good Art forums and communities aren't mutually exclusive from one another. Basically nothing has to be wrong here for ArtStation to be worth recommending.
Followed, you've got some pretty sick stuff. I'm still getting mine up and running and have messed around a bit, but I think ArtStation is going to be dope, especially when they get the custom websites/themes and stuff up.
Ca.org is great for discussion and critique, but ArtStation is giving you a pretty good/flexible portfolio website and a very slick way to view pieces and follow artists that you like. I think the functionality of the two websites is very different right now.
Btw for those that don't have access yet, you can request an invite here: http://www.artstation.com/invite I don't remember how long it took for them to e-mail me back, but it wasn't long - maybe a day or so. Or you could post your e-mail in this thread and one of us can invite you.
Good Art forums and communities aren't mutually exclusive from one another.
True. I'm a member of other forums (including when it was alive), but artstation doesn't have one. It's just a portfolio place for people to look at the pretty. I was asked if I wanted an invite in the first week, but I have enough art to go through already.