I haven't had a chance to do a "deep-dive" into the changes yet, but at a glance they all seem good (except one - imo).

Personally, I see value in keeping the posts from users. If there are any there that are no longer providing value, then let's get rid of those or replace them.

As far as pages with a lot of comments not loading on cell phones - that more seems like something that should have an issue open to address. (Not a reason to get rid of links to posts with a lot of comments.)