The deal was Goyer had an idea for doing a "Superman Begins" movie and pitched it to Nolan. Nolan was with it but didn't want to direct because he was done with directing comic book movies, Superman wouldn't be his kind of movie to direct and he was already invested in doing Interstellar. So he hired Zack Snyder (which we can argued WB insisted ) to direct because he liked his visual style which Superman needs. Snyder and Goyer had the complete creative freedom to do whatever they want with only Nolan giving okay for things they asked for as advice. All the controversial stuff was strictly Goyer & Snyder (like the Zod neck snap and shyt). Originally they wasn't going to do a DCEU, it was just going to be Man of Steel 2, but because of its commercial success, WB got greedy and wanted to build off of THAT film. Goyer already had things written for Man of Steel 2, but had to scrap it because they wanted to change it to BvS and signed in Chris Terrio to rewrite it. So you had TWO films shoehorned into one just to push a connected universe. So if you mean by that as setting the tone, all I would have to say with BvS would of been FINE had they allowed Man of Steel 2 go as originally planned setting up for BvS.
But with all that said, all that had NOTHING to do with Ayers. Ayers was approached by Geoff Johns to do a Suicide Squad film and said he would have his OWN total creative freedom to it. So all the creations of the characters in Suicide Squad came from HIS vision and not Snyder's or anybody else's. The only true connection was mostly from the re-shoots after BvS was completed so in order to universe build. But that's mostly just Easter eggs no different from how those Marvel Netflix shows made a haphazard mention of there be some Easter egg of something from the bigger MCU. But from how things are looking, Suicide Squad isn't suffering due to being SHOEHORNED into a bigger DCEU but rather than it is a BAD STAND ALONE FILM. BvS may have most of its fault mainly due to trying to force its own universe all into one FILM... but that has little to do with Suicide Squad. That's Ayer's vision and the tone that HE wanted to set, not Synder's.
"Critics" are just too soft in 2016. I'm ready for this shyt 
