I also think that the incentive to vote fast ( 30 min rule) is really the most terrible one as it forces even manual curators to blindly vote for content.

the 30 min reverse auction is not an incentive to vote fast. Its a penalty for voting fast. Curataors voting in the first 30 minutes after a post is made forfiet a percentage of their curation reward back to the author.

The idea is to partially counterbalance the top heavy structure of curation rewards (which favors bots). Even though bots like wang frequently sacrifice 90%+ to the reverse auction, they stillas good or better than regular voters.

If the reverse auction were eliminated, bots like wang and recursive would be making 10 times as much as comparably sized normal curatiors.