Bill Zebub
“It’s probably Matt Mercer’s fault.”
You do not really want to bring these back. I just finished the Forge of Fury and are running the Against the Giants from Yawning Portal book and after 40 years, they are a bit weak- in most everything. FoF is a 3e and much better than the 1e Giants, but Wizards did not do much to update them to 5e and the old 1e problems show. The random traps and secret doors that need to be bypassed and the almost, but not quite 10x10ft room with an orc and treasure chest sitting in the middle, next to a 20x20 ft room with berserkers and no chest. It is a hackfest though.
Going back to 1e would not be good, but your ideas are gladly not that and I can see a 5e supplement to make dungeons better is welcome.
I've seen Yawning Portal FoF 4 times now: as a player twice* and as a DM twice, and all four times it was a huge hit and tons of fun. So...different strokes/different folks? I agree that WotC could have tweaked a few bits of it, but I'm not sure that an argument that they did an imperfect job updating specific dungeons is an argument against wanting more dungeons of that style in general. (Which was a gentle way of saying it's unreservedly not a valid argument.)
I have not yet played or DM'd the updated Against the Giants, but even if it's terrible that by itself doesn't invalidate the idea of old school dungeons.
Anyway, I tried to make this a "+" thread. If you don't want old school dungeons there are other threads where posters are eagerly awaiting your judgement.
*The second time I ran through FoF as a player the DM knew, but not the other players. I proceeded to encourage many, many bad decisions. Much hilarity ensued.