Agreed with all the above. I loved the show as it was coming out and think a lot of it still holds up, but a lot of what you guys are saying is spot on. The show, while expertly executed, did engage in some of the trends that I think were and are bad for DC in the long term, and have proven so in the years since it ended.
Mainly, as many have already noted, the Batman fanboyism in that show was REAL. That show subscribed to one philosophy: Batman basically could NOT be stopped. Batman can do everything. Batman can outsmart and outmaneuver Superman. Batman can dodge Darkseid's Omega Beams. Batman can outsmart the Legion of Doom singlehandedly. Batman is too cool to hang with the rest of the JLA. Batman is always prepared for every scenario and is always the first one to figure everything out. Oh, and Batman can get all the women in the DCU, some of whom he's NEVER been linked to romantically in the comics: Batgirl, Lois Lane, Zatanna, Cheetah, Wonder Woman, etc. They all just can't help but fall for him cuz he's THAT cool (despite that obviously being pretty misogynistic). Oh, and Amanda Waller just HAS to make sure that there's another Batman/Bruce Wayne to continue on his legacy. That's why she did what she did with Terry McGuinness. Because, in her own words, "there's nobody else like Batman."
I mean, I'm not saying Batman shouldn't be impressive. He should be. That's kinda the point. But, making him out as literally the best at EVERYTHING in the DC Universe and the center of everything is just overkill. And that show was certainly guilty of that.
If anything, I'd prefer something like Young Justice serve as a blueprint of the DCEU, if we needed one. It's a bit more balanced in its representation of the DC Universe. It's not the "Batman and Friends" show that the DCAU Justice League was.
No, it really doesn't. You have no idea how many times I've heard the comparison among friends (most non-comic book readers) who say something like "You know why Marvel is better than DC. Because Marvel doesn't just rely on one or two characters. DC only has Batman and Superman. Marvel has so much more than that."
Of course, we know that DC DOES have a lot more to offer than just Batman and Superman. BUT, that's the perception that's popularized by their current strategy of focusing so heavily on Batman (and to a lesser extent Superman). Marvel and the MCU have been able to make characters like Thor, Loki, Captain America, the Guardians of the Galaxy, Falcon, Winter Soldier, Black Panther, etc. mainstream.
Meanwhile, DC has barely been able to make the general audience aware of the rest of the Justice League. The only unqualified success that the DCEU has had in significantly raising a character's profile has been Gal Gadot's Wonder Woman. Before 2017, many people thought Wonder Woman was lame. Now, people love her, even after 1984. So, the lesson is this: DC seriously needs to stop prioritizing and rebooting Batman and Superman or they're gonna be left in the dust.