While you make some good suggestions, the idea that EOS & Tron are industry standards and something Steem should be copying is a fundamentally flawed premise.
These blockchains have worse problems than Steem and have far less real world functionality and usage.
The idea of more professional block producers is a terrible one, which undermines decentralisation.
The opposite is the case, it should be as easy and cheap to be a Steem witness as running a Bitcoin node. The recent HiveMind and MIRA improvements make this almost a reality.
Professional block producers are juicy targets for governments, regulators, lawyers and competitors. If you are visible, and have assets you can be shut down. If it is difficult to replace you then the whole blockchain can be shut down by a concerted legal attack.
Thousands of widely distributed individuals with commodity computers and basic IT skills can never be shut down.
EOS in particular is in real danger of being designated an illegal gambling service and having all its block producers served with legal papers to shut down lest their executives be arrested in airport transit and extradited.
Over 90% of EOS DApp transactions are gambling without a licence, which is illegal almost everywhere.
Also EOS is really expensive for developers to run DApps on with RAM prices etc
I agree with your point 2 regarding reducing powerdown time.
Point 3 is being resolved by SCOT & Nitrous.
See my post today on this topic. https://steempeak.com/steemmonsters/@apshamilton/economic-observations-on-steem-engine-steem-monsters-next-colony-and-the-long-tail-of-money
This works in the opposite direction as well - if you're a legitimate, compliant business, the last thing you want is to be reliant on a bunch of darknet block producers. Maybe your vision of blockchain is as a niche anarchist system where everyone's free to do whatever they want under the guise of anonymity. A lot of people thought that about the internet at the beginning, too, and before too long they were overwhelmed by the power of compliant, public, honest businesses.
In the Western world at least, the best defense against arrest and shutdown is not anonymity, it's being a compliant corporation. Example: PokerStars, who ran a huge illegal gambling operation in the United States for years, and when they were caught their punishment was a settlement which essentially boiled down to them being allowed to buy their biggest competitor's userbase.
You are making a false dicotomy here.
The choice is not between darknet anarchist and professional corporate block producers.
There is a middle ground in which both Bitcoin and Steem sit: regular people, law abiding citizens of nations all around the world. What the US Constitution refers to as "We The People".
The fact that Bitcoin allows regular people to be block producers has not stopped legitimate businesses adopting it.
DPOS is essentially stake based representative democracy. If only big corporations can be elected to the parliament then there is a problem.
The second issue is that compliance is about what you DO not WHO you are.
Steem is compliant because the vast majority of what it is used for is legitimate activities.
EOS is not compliant because the vast majority of what it is used for is illegal gambling.