I completely agree with you. While not entirely your point (rewarding "creators" and readers differently) you point out something I've noticed about steemit. I find much more enjoyment on a platform such as reddit than on steemit and I believe that the reason for that is in the comments.
On reddit, if one has something to say about a certain subject, one just goes to the comments and points it out. I've not been seeing that much on steemit, mainly (I suppose) because comments do not give as much money. The comments are usually the most interesting part of a reddit "discussion". Sadly that does not seem to exist here, atleast not to the extent I wanted.
I agree, the comments are the "discussion" of the original concept / idea.
And to me they hold value.
I don't profess to understand the details re "rewards", what I have seen are stats in regards to 50% of new users leaving. If 50% of new customers in my business didn't hang around, after I'd spent time & energy attracting them.... I would want to know why.
My 'guess' on that is the reward scheme is currently incorrectly focused to support platform growth (eg 400K -> 4m or 40m sort of growth) but maybe that is not the steemit plan? I don't know :-)