I agree with some points, but with respect to having simpler or just one token I disagree.
It's better to have steem and steem power separate. That way, users maintain control over how much voting power they want to use and maybe use steem for other transactions. Having voting power to be based solely on accumulation of steem can go a little backward.
Also good to have SBD token so every payout also means a payout in the real world. I did rather withdraw SBD and keep steem rather than having to withdraw only steem and also maintain my voting power.
The editor could be improved of course, to provide basic functionalities for formatting. And there should be justification of the text! It's high time we users get that. But otherwise I'm very happy with the markdown editor.
I think post promotion is more the whims of whale votes and others, but hopefully communities will resolve some of that problem and spread posts to be promoted evenly.