I'm going to fix the release script, I think it's basically just adding "-Preleasedocs"? Will do some before-and-afters to compare.
I suspect it's going to be a lot more than that. Would you rather I take a crack at it?
Cleaning up the releasedocmaker lint errors will be a labor of love. I did some 3.0.0 cleanup earlier this week, but did not tackle the branch-2 releases. Ultimately this falls on the 2.8/2.9 RMs, but anyone with JIRA permissions can help out with this.
I did a big pass through the 5 years of 3.x issues and all of the 2.x issues late last year, with some touch up a month or so ago. They should be in pretty good shape really.