The points that you mentioned are quite interesting.
Increasing cost of production can result in the growth of token value but if it's difficult to earn tokens, it might also discourage a good chunk of people to participate. Just my opinion.
Market acceptance, yeah. And I'm glad that Steem community is working on it. The majority of your points positively applies to Steemit and Steem. I am hoping the price of Steem to reach to the moon!
That's right. For btc, they've a rising cost of production that's quite measurable. Miners wouldn't sell cheaper for what the cost is. As for Steem, the floor cost of production is not very clear to me..