tbf there's not much that can beat a goat austin promo lol. and i'm not against a more serious presentation, hell aew had an awesome special with nothing but interviews leading up to their last ppv. all i'm saying is today's mainstream wrestling audience probably grew up on wwf/wcw, so it's possible behind the scenes they weighed their production choices and maybe they saw that going for a more typical rasslin show was ideal, who knows.
i think a sports oriented show like you're proposing (like the pre-ppv specials or jim ross' sitdowns) would've been great too, but it's a bit reductionist to say all aew does to build is doing nothing but 20 min in-ring promos. i don't even think they've ever had a promo go that long lol, and if they did they're usually filled with wcw brawl fuckery, and don't feel as dragged out like wwe's are.
sure aew does in ring promos, backstage segments, and other typical wwe shit to build their storylines, but they definitely have a fresher approach(wrestlers having more input on their characters), their presentation doesn't feel stale(jericho cruise, no-crowd show), and they are willing to listen to feedback(nightmare collective). it all adds up to an entertaining tv show imo. it being a mixed bag of wrestling, i think you could find something you would enjoy.
edit: i'm pretty sure aew doesn't really script their promos at all, at least for the big players
tldr: #StandUpForAEW