Should Ezra Miller be replaced by Grant Gustin in the DCEU?

This. OP is so ignorant for even posting this.

here is the thing neither of them fit the role neither of them fit in the DCU Grant seems more like a TV actor but fits the role more then Ezra but i will judge it if i see it

Ezra doesn't look like Barry Allen, but neither does Gustin. So naturally the role should go to the better actor, which seems to be Ezra.

Miller is way better actor

His role in We Need to talk about Kevin is better than anything Gustin will do

No. Ezra looks to be stealing the show in Justice League. I only saw the few seconds of his character in the trailer and his quirkiness came off as less filtered and more natural than Gustin.