The biggest issue with steemit, from what I can tell, is that delivering value is not the same as getting value. The interests and people that are rewarded here are VERY narrow and seem to be more about whom you know rather than what you write. And sometimes it's just random. I saw a post that was "I'm skeptical about getting paid" - like 3 sentences of this, and it was over 1k in rewards.
There are plenty of vastly more valuable posts for the community here getting like.. 20cents. This is defended by posts about how the "whales" are choosing what will be big to bring in peope.
But if you LOSE people then you have to bring in even more. I expect steemit to get flooded for a while, then "churn" will be HUGE and it won't matter. Just a flash in the pan.
This is the beginning of the churn. If the main thing that gets money here is praising steemit and boobs, then expect it to just become a soft porn site powered by bitcurrency. The worlds first digital strip club? Groundbreaking, I guess. But probably not what was intended.
Regarding the variety of content, a fair point indeed. I see lots of great content in niche topics go completely unnoticed.
I suppose that's just a result of it being a brand new platform. I bet these things balance out as Steemit becomes popular. To be fair, Steemit developers are on it - the hard fork today adds several measures to improve content.