Ehhh Idk, when it did appear they were "copying Marvel" in Suicide Squad, the new-found geek general audience went apes*** with how DC needed to "get their own identity". Also, I think it's becoming romanticized of how Phase 1 Marvel dealt with Easter Eggs (Not sequel hooks) post Iron Man; other than RDJ popping up in Hulk, and Coulson appearing in only Iron Man 2 and Thor before Avengers, Fury appearing in Iron Man 2 and Cap, it was just little nods at a bigger universe...like Diana appearing in BvS (albeit more Black Widow like but still) or having Carol Ferris appear in MOS and BvS as a fly on the wall.
And of course, you can't forget that Marvel had 5 films before Avengers while DC has 4 before Justice League, but how else would you make a JL film? If you introduce every single member singular, it could get messy.
IMO when you do follow the MARVEL formula to a T, you get Iron Man 2, Thor 2, Age of Ultron, the weaker elements of Dr Strange and the lackluster stakes of Civil War. It's a shame when that formula means "just set up future team up movies and worry about villains and plot dynamics later". Marvel has an amazing catalogue of villains alone, but other than Loki and Thanos, who else is a serious threat that could change the status quo for Marvel? I think that's my issue, it feels a TV show in that regard, villain of the week shows up, makes thing crazy, everything's fine at the end. Tony's PTSD and the things that happen post Civil War will change that, but seriously: Red Skull should've appeared again. Abomination should've been used as Hulkbuster 2.0. That's just 2 examples.
DC has a chance to do something very different, that hopefully doesn't copy any other formula. WW felt different because it wasn't meant to be a sequel to BvS, Suicide Squad felt different because of new characters, MOS was different because it wasn't Donner or Timm's version. The world building feels a bit more natural and not so matter of fact when everyone is not 2 feet away from each other...even though Aquaman should've totally saved Lois in BvS...but Lois shouldn't have put the spear in the water in the first place...ugh.