I think that the changes will be overall beneficial to the entire platform if we have enough manual curation. However, I think as it stands right now, we really don't have enough active users to generate sufficient manual curation.
Hopefully, as what you have mentioned, low SP users can start to engage in more manual curation since the curation reward is now higher. But, given that these users have low SP, the rewards might be negligible. And in order to get more rewards, these users might want to vote for bigger users since their posts are likely able to generate more rewards. Thereby skewing the "wealth gap" even further on this platform
Overall I think there are too many moving parts. The convergent linear reward curve could have been introduced later on to reduce the uncertainty for this change. For now, I really don't have a good sense of what might happen in the longer term. I'm hoping for the best, but always prepared for the worst