Curation rewards go up, bots benefit more from indiscriminate vote selling.
I don't think this will be the case. Many users delegate to bots because returns are so much higher than alternatives. Raising curation rewards gives users a better alternative to earn from holding stake. I would expect, if curation rewards are raised sufficiently, users to undelegate from bots and more actively curate. Bots earn curation rewards, curation rewards are based on stake. Less delegation will result in less rewards for bots.
I still maintain that it might not be the case. Bots offer a way for inactive accounts to earn pretty decent curation rewards. More active users might undelegate and start curating manually, but there will still be a large group of people who will stick to the bots, especially now that curation became even more beneficial.
Higher curation rewards will also mean higher rewards to dapps. Inactive accounts can choose to delegate to dapps instead of bots. If dapps are also earning revenue from advertising, delegators can get a share of that as well. If curation rewards remain low dapps will struggle to compete with bots.