Hi Joe, we're upgrading and will now be dealing with this enhancement as well. In our case, almost all of our blogs are of the "news" type, so I will use SQL to turn off the "show name/avatar/bio" fields for all existing posts just after upgrading. However, we will still have a bit of a retraining issue since users will need to remember to uncheck the options each time they make a news post, and this may be error prone.
If you could put in an enhancement request to add blog-level default settings for "show name/avatar/bio" on new posts, that would be awesome.
Thanks,
Jamie