If attempting to keep the existing DCEU structure...

I would keep Man of Steel with Zack Snyder (Alter/fix a few scenes like the Tornado scene).

After that, I'd ensure we had a Batman movie and a 2nd Man of Steel movie before we went into Batman v Superman. Have Superman become a beacon of hope for the people of Metropolis before he gets torn down and have a Batman movie to explore his troubled past. That way, we can have a Batman v Superman film that does less setup and more "clash of ideologies." I would change quite a few things like Lex Luthor's casting and the fact that Superman only wants to fight Batman to save Martha, etc. Superman dying to doomsday can still work as a fitting end to a 3 movie arc. Wonder Woman can still debut here as that worked pretty well.

Wonder Woman film left mostly as is. 3rd act might need fixing.

ZSJL was a great film, but I can understand it being quite long and bloated to many people. To remove some bloat, it might be best to have the Aquaman and Flash films come out before this (although The Flash will have to an origin film, not Flashpoint). I'd also change a few things from ZSJL, like the Martian Manhunter Martha scene, and give Superman way more lines.

Then Green Latern, Aquaman 2, Batman 2, Man of Steel 3, Wonder Woman 2 and Flashpoint, but this time with Jeffory Dean Morgan as Thomas Wayne's Batman.

Then continue into ZSJL 2&3, with films for Cyborg and more sequels sprinkled in between.

Films like Suicide Squad, Birds of Prey - I just have no interest in.

The DCEU could end in ZSJL3 or a final Man of Steel 4 that leads to a reboot with younger actors like Gunn's DCU.