What do you like, what do you dislike

I like: 50%/50% author and curation rewards.
I don't like: The Steemit Team "expect posts that would make more than 20 STEEM under the old rules to earn more after the changes. Those posts that would have made less than 20 STEEM under the old rules will receive less after the changes". The few rich gets richer, while the poor majority gets poorer.
I also don't like that our upvote values halved (mine is dropped from $0.008 to $0.004).

What is steem doing well and what is missing

The 50%/50% author and curation rewards are good, most of the other things in HF 21 are probably bad for the Steem blockchain. If the GF21 will reduce the number of content creators, and increase the number of curators, then that part will be good, but we will see. New and Small accounts have trouble interacting on the Steem blockchain, because they often run out of Resource Credits (RC). Anyone could write a whole book on what is missing.

How do you want steem to change in the future to be engaged

For example every new user should get a proper delegation (at least 100 Steem Power) at least for a few weeks (or 1 month) to avoid problems with (running out of) the Resource Credits (RC) in the beginning. Active users should be able to build up their accounts in 1 month. Maybe the whole platform would be more attractive for new users in that case.

What will make you leave

The Steem Blockchain? I don't even want to know, but it has to be very serious.