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Yes, it wouldn't remove comment rewards. It is more like thinking of splitting the reward pool into 60% posts, 40% comments or something like that. Neither new split pool could touch each other. The percentages I listed are only for example. So if someone is draining the posts pool the 40% comments would be unimpacted by that. Vice Versa, if comment pool as being drained as @jerrybanfield's post here illustrates then it would have no impact on the posting pool.

Interestingly enough, the two posters we're discussing in this case were taking from two different pools. Tamim from the posts, mindhunter from the comments.

It might be that a split wouldn't do much good in the current situation?

Hard to say. It would partition it where we could potentially focus on specific problems.