Here is a comment from one admin... (using my normal posting identity)
This approvals system is an experiment. It has taken a bit of time to iron out some glitches, and there are still a couple of outstanding problems (mainly from the perspective of admins). The problem of closed threads in the message list is still not fully resolved; but it is a lot better than it was.
My perspective is that it has been mostly a success; but I am very interested to hear criticisms. I am not sure exactly what RingoKid sees as the main problem.
On the one hand, there is the time delay factor. That problem will most likely remain. Depending on the time of day, it will take anything from a few minutes to several hours or more before a thread is reviewed.
On the other hand, there is the question of thought control.
The main reason for rejecting posts is violation of forum rules. Another effect is that new posts get a bit of formatting feedback before coming on-line. I'd really like to hear more from people who have had a new thread delayed for a while while they make some changes. Has this is a nuisance? Or have you appreciated the chance to make the suggested changes?
I'm not aware of a serious problem with moderators enforcing what people should think. I am very much against any such effect. On the other hand, I have recently rejected a topic which was simply not relevant to any of the main forums or to anything associated with evolution/creationism; this is a slightly different matter and I thing nipping such distractions in the bud is a benefit.
Cheers -- Sylas