The thing is that... some people are saying .. "This is ok for a first version", as if there was going to be a second one, improved with a lot new features. That might not be the case. Could, maybe. Perhaps. If history is an indicator, then probably not.
So .. I am assuming the first version is all there's going to be (a valid assumption that leads me to make decisions without over expecting from the developers and nullifies the chances of me being disappointed in the future).
From what I can see in the screen shot...
Resource ratings (with stars)
Versioning, maybe
The rest, is just fluff. A new cute display over what we already have. We can already upload attachments and pictures. We can already have a thread discussing the addon. I can already search for all threads for a user in a particular forum (the addon releases).
It is good to have things organized, in their proper place, but it's hardly ground breaking. The paid addon integration would be, though. It takes the resource manager into an app store. People can use it as a simple cart if they want.
I haven't tried myself, I don't know how hard it is to instead of "download" start a paypal transaction to the author's email that once completed downloads the file (and the file remains available for the user). It might be too many technical complications (or legal, or whatever). I don't know.
Not to demerit the resource manager, but right now, I see it as a glorified way of downloading attachments.