Unless there is a closed, members only forum, new members just have to be welcomed, some will embrace it, others will abuse it, Little Bill will do his best to nudge people in the right direction.
I like it as it is, I'm not sure what could be done to make it better without closing the doors, if that happened, what then? a very slow moving reviews board and slow responses to posts.
I have a very active imagination and like to write lots, quickly. I like posting songs regularly, it keeps me driven and enthused and I enjoy the interaction between others. If there were no new blood, getting involved and posting new material, I'd have no new stuff to review and my songs, and those of other regulars would soon clutter the board up.
Maybe it's cos I'm still relatively new myself, but if it were closed and less inviting when I first looked at joining, I may not be here now, in a musical sense, as this place has brought me on leaps and bounds compared to the first 15 years of my hobby.