I think the best change is that while bad actor accounts can still be created, the incentive to do so is lessened. This is due to the initial Steem now being burned. New users will have a minimum of RCs (bandwidth) but initially start with no SP. The old practice of creating large botnets to circle upvote is destroyed, as 1,000 accounts registered through Steemit inc. will now have 0 starting SP to work with collectively instead of 15,000.