Cool story, but the same applies to your perspective on the issue. You're jumping into the realm of fanfiction, very unlikely fanfiction TBH.
What we have now works, and fires on all cylinders. MCU has been a massive success and accomplished everything any studio could hope for. As close to perfection for audiences, fans and execs as we're ever going to get.
So why mess with success?
You haven't remotely responded to the point being made.
None of us know how things might have worked out, precisely because it didn't happen.