I'm in favour of sticking to the roadmap as laid out by Steem inc.
After HF 20 and the implementation of the RC system all focus can be on SMT's/hivemind/communities.
I have faith in the team and I believe they can deliver this product.
The new RC system should give everyone this confidence imho that they can deliver.
I have lived under all economic incentives since July 2016. I prefer linear others prefer n^2. But it doesn't matter now anymore.
The blockchain has changed. Besides users trying to get rewarded for content back in the day we also have businesses here that are trying to get a foothold on the blockchain and have build a business model build around this model.
With linear you know what you can get. Both for users and businesses. It creates stability. (And if you are very good you can get more).
Trying to change the economics on a token that caters both pretty well right now makes no sense. And it makes even less sense when you know SMT's are coming.
SMT's will give any community or App the possibility to implement whatever reward model they please.