I felt like the original exclusion list was a bit of a mistake, but seeing how many of them have acted since, I can't really see how bringing them back in as a whole would be anything but bad for the Hive. I think they would all dump.
Then again, them dumping wouldn't be all bad. It would be better for those of us who are still trying to power down from Steem. I'm pretty sure that Hive has more active users than Steem. I've got some thinking to do.