The OG is good because the CHARACTERS. The movies focused on their journey's and the plot connections were limited (mostly post-credits). Since Endgame, it seems like the quality has dropped because they are bringing in characters without really developing them. Here is this character and this one and this one, BOOM. They are bringing them in to check off boxes but aren't crafting stories for them that make us, the audience, really care for/connect to them.
The things that have worked well (WandaVision, Ms. Marvel (IMO), Loki (to some degree), Spider-Man: NWH) have worked because the characters have been the focus. A lot of the other stuff has been plot focused or used to introduce important story elements/worlds/information/etc (Looking at you DS2 and Ant-Man 3).
So, bringing back the OG is a huge mistake, IMO. Let those characters have their endings and create stories for the new characters that work. Then, when you get buy-in again, start to connect those stories. Everything doesn't have to have a connection right away. These characters are in the same universe, we know that, let them live their lives without having all the plot connections all the time.