#1 WWE can learn a lot from AEW's Tag Division
WWE's Tag Team Division pales in comparison next to AEW. This isn't an opinion but rather a consensus amongst the wider fan community. Sure, The New Day and The Usos are the exceptions, but Vince McMahon seems more interested in splitting teams than keeping them together for the most part.
Manufactured teams have also been a staple since the 1990s. Rock 'n' Sock Connection, Rated-RKO, and even the most recent RK-Bro are examples of teams that were/are easier to break rather than to keep them together. If one were to look back to The Attitude Era, WWE had the New Age Outlaws, Hardy Boyz, Edge and Christian, and The Dudley Boyz all around the same time. But that impressive synergy of tag team wrestlers is not present on the current WWE roster.
The AEW roster is very much invested in it, thanks to The Young Bucks, who are helping on the management side of things. Moreover, Tony Khan is very much in favor of tag team wrestling. Teams like Private Party, Lucha Brothers, Butcher and The Blade, FTR, Jurassic Express, etc., have been some of the highlights of AEW.
In fact, FTR left WWE due to the company's perceived unwillingness to invest in tag team wrestling. More importantly, they were pushed into childish antics during their feud with The Usos, which didn't do great for their image. It's something that they have rectified since coming into AEW.
WWE used to have a tag team division that soared above others, creating innovative matches like TLC along the way. Can WWE find that spark again? Only time will tell.