Well like you said, we'll have to agree to disagree on most of these points. But I just need to point out that
Watchmen had a PHENOMENAL cast, not just JEH and PW - I've seen all of them do truly wonderful work before (Akerman aside) - and they were screwed by really stilted, awkward scenes (not in writing, just in pacing/staging/tone). THAT is a fault of the directing. IMO, he doesn't remotely have a handle on timing, tone, emotional truth, or subtlety, all of which are vital for a storyteller.
And of course green screen will be used, I'm not that naive. But Snyder's "fantastic visual style" is actually a style that's DEFINED by green screen. He
needs CGI to make his films look the way they you're talking about. For him, it's not just a tool - it's a crutch.
Dawn of the Dead's visual style certainly didn't get him labeled as "a visionary."
So you want to see Brad Bird shoot live-action before giving him the gig. I guess that's understandable. I want to see Snyder shoot something that doesn't look made-for-MTV first. Oh yeah, and learn how to tell a good story. Which do you think will happen first?