Quality control, for us, means trying to minimize the number of sites listed that are somehow in error.
Therefore, the priority is to delist expired domains, hijacks and the like, as soon as possible. We are very very careful about being so hasty to let these sites back in, as our experience has shown us that the buyers of the domain are often trying to fool someone (possibly us).
Now, I am not saying that this is necessarily the case, here, just explaining why it's not something that is done automatically.
So delisting a site and having it not listed is not an "anomaly" - it is regular directory practice.
The quality control feedback aspect was dealt with immediately - the site was delisted.
As for users suffering because this one particular site (or any specific site, for that matter) did not get immediately included back in the directory, I would like you to tell us who, specifially, you feel, would "suffer".
The nature of the ODP (like it or not - my guess is that you won't) is that sites get included according to the timetable of a set of editors which are capable of reviewing it, depending on their level of interest and time. Most editors are not sitting around waiting for something to do - there is more to do than there is time available.