I agree with much of what you said here.
I believe that this post touches the truly important points of this new stage that Steemit and Steem are living.

What if Justin wants to take over Steem Blockchain?
Of course yes. That is your ultimate goal. Steemit was the first step. And it was a huge step, since Steemit is the backbone of the Steem ecosystem.

I think we should be confident. This seems to be a masterful move and it will take time to complete it in its entirety. But I'm sure it will be the best thing that could have happened to Steem in a long time.

Can Steem Blockchain operate in some layer of Tron? The answer is no.
But the Interoperability of these two blockchains can exist.
Where both chains will maintain their autonomy. Of course, Sun will maintain a hierarchical level where Tron will be up.

Finally, it seems to me that the most successful option for all users today is to increase their stake as much as possible.
Both Tron and Steem are based on DPoS consensus mechanisms. So, if you want to maintain your strength and your influence on the new "Steem-Tron" or "Tron-Steem", you will need your SP.