Some of this, well a lot, I agree with. However I do not like people telling me how or what I should vote on, so I can not support anything that tells others how or what to vote on. I still see nothing changing with HF21, I have never believed the use of bots would decline, I still do not think that will happen, and evidently from your post you do not think it will happen either, so HF21 is going to be a failure at resolving this issue. I also still believe it will be a failure at the down vote issue being used primarily for excessive rewards.
I honestly hope it all works out, I after all do still use the steemit front end, (mainly because I do not see the ads). I still think that steem block chain can be a fantastic social place if the down vote issue could ever get resolved.
There are much better Steem blockchain interfaces than Steemit.
For example SteemPeak, Busy, and eSteem.
There is even a desktop app for the latter, called eSteem Surfer, so you don't even have to/need to use your traditional web browser to interact with the Steem blockchain.
And eSteem Surfer have other advantages over Steemit and other interfaces.
For example you are continuously "mining" (collecting) eSteem Points (ESTM) while you use the application.
You can earn eSteem Points (ESTM) By upvoting, resteeming, posting/commenting, and even by simply using the application.
You can use these eSteem Points (ESTM) for various things, including post promoting/post boosting, and many more features/use cases are being developed at this time, such as getting Steem Power delegation for eSteem Points (ESTM), so there already are many use cases for eSteem Points (ESTM), and there will be even more.
I am writing this comment from eSteem Surfer 2.2.0.
I am aware of a lot of the interfaces, have tried a few, I actually like the way steemit works, basic. I just don't like the ads, but fortunately I do not see the ads. For what ever reason, good ad blocker, or virus stuff or what not. I know steampeak is head and shoulders above steemit in quality and look and useful things built in, my wife uses it. I see a lot of the front ends as the old browser wars, I think it unfortunate that Netscape lost out to microsoft. We get use to a way a thing looks and how it functions, and we learn the work a-rounds.
Some things need fixing, some things need altering, and some things just need to be done away with. One thing that the Owners of Steem Block Chain need to do is figure out what they are, and perhaps stop trying to be the JOAT, (Jack Of All Trades) of all block chains. Specialize in one or two, get the kinks for them ironed out, then expand.