Is it normal for folks to create dev logs in this forum as they go through a project, share WIPs for feedback, etc? Or do people use News posts for that generally? Sorry if this is a silly question.

Also: The game I would be posting about is an adult game, and I'm not sure if it's ok to post about adult topics in the forums themselves.

The rules say adult content must be warned about / tagged clearly, which for a News post is easy since they have an age rating, but for a forum topic, I'm not sure what to do? Put [NSFW] in the title-?

Either is fine, some people do the former, others the latter.

I'm not really sure how many views/responses it'd get here on the forum because it's easier for people to identify posts which are asking a clear question, whereas questions and requests for feedback may be buried further down in a devlog. Most of the time I don't really post replies in devlog threads because I don't know what to post. Whereas if it's a pointed question that's in a thread of its own, it's easier to respond to.

That should be sufficient, yes.