It could just be bad timing but it seems to me that almost all the new questions are third-party plugin or theme/CSS questions (all technically off-topic). What can we do about this and is there anything I can do (aside from flagging them and adding a comment about what the community is looking ...

I've been looking through all the tags that have posts (most having posts this year). There are very many that are automatically off-topic and more that it would be hard to make an on-topic post for. I counted 62 off-topic or probably off-topic tags. adsense advanced-custom-fields amazon ...