Definitely created positive impact in Steemit especially to minnows. They will be more encouraged to engage in commenting posts due to higher revenues. The 4x voting power helped a lot for minnows to strive more in Steemit.
However, the new update is very dangerous. I see "Abuse" on this update. Community, groups, clans and connections will be the key of the abuse. Which means, trading upvotes will likely be one of the major problems of this HF19. Thanks @hardfork-series!