Who are these established stars who are apparently not even half the star that Orange Cassidy is? The Young Bucks? Like, I don't get this argument at all. The entire point is that the title should be put on a clear star, and that Darby, Sammy, etc are not on that level yet. If Cassidy gets a belt, his pops would probably decrease because that's not what his gimmick is. That's why you need to put it on an established star who can carry it well for its first reign. There are very, very few stars in AEW and the belt needs to go to one of them for it to mean something.
And, no offence, but with respect to the tag titles, perhaps that's just you? There was intrigue about the Bucks losing, sure, but the tag title matches would lose viewers and the constant complaint at that time was that the titles did not mean anything. With the YB-Omega/Page angle, the titles have actually meant something because the fans care about Page now, and they care about the Young Bucks, so them fighting over the tag titles is making the titles seem important. It was also during their reign as champs that the tag title matches have started to consistently get good ratings.