What exactly do you mean?

It is not improving.

If the situation is getting no worse,

This is up for debate. Vladimir_M and others have argued that precisely the fact that blow ups are rarer means more uninterrupted happy death spirals are occurring and we are in the processes of evaporative cooling of group beliefs on the subject.

I think they are right.

notice the population is expanding.

LessWrong actually needs either better standards of rationality or better mechanisms to sort through the ever growing number of responses as it grows in order to keep the signal to noise ratio close to something worth our time. Also I'm confused as to why a larger population of LWers, would translate into this being something LWers can more easily make progress on.