These are sensible points but I would think about that carefully though before making such a drastic change.
I'm not sure what the rate of voting is vs the rate of posting. I suspect removing curation rewards completely might cause a significant reduction in the number of people voting.
There is already a perception that many people just "post" and leave.
Again I don't have the data with regards to that but it makes sense that when people are taking a lot of time and effort making a post they will have limited time to curate content.
There needs to be some kind of encouragement for curation.
One possible alternative I have considered is that curation grants a "posting reward". What I mean by this is that everyone must curate a certain number of posts before they can post their own.
Obviously this could have it's own potential problems in that people could just start randomly voting on content to simply get to necessary amount of curation in order to post. It would also penalise people who are more picky and selective in their voting. Perhaps you can think of a way to make this more viable.
Anyway it might be useful if you did a separate full post on the curation issue.
That way the community might also be able to help in coming up with a workable solution. The more people looking at the problem the greater the likelihood it can be successfully be solved.
RE: Whale’s dilemma