I think there is room for both bots and humans. The current bots are very unsophisticated, and a good human curator could easily outperform. If Steemit one day scales to millions of users, then a well designed not may end up with the upper hand.

The is potential for both good and bad curation from both bots and humans. Also, it is really unknown what the true outcome of the voting changes would be, because one of the largest variables is how users and bots would adjust their behavior to adapt to the changes. It's one of those things that we wouldn't really know until everything played out.