My favorite dungeon crawling happened to be wow's burning crusade heroics. Wildstar's to a lesser extent. Single packs, tactical chain cc, and dangerous mob mechanics to watch for.

I think most people these days see that as unneeded resistance instead of fun, though, despite my mechanical engagement bliss.

I would like to see lots of rewarding side content - alternate bosses or boss modes, and paths. The gotcha for pubs is not everyone is going to want to do the side stuff (especially if it's a repeat visit). It then becomes another point of party fracture as everyone has their own idea on just getting through it vs full clearing it.

You'd need a way to ensure players enjoy the mechanics and side content of dungeons enough to want to do it - and I'm just not sure how that can be accomplished anymore.

Maybe I'm just cynical?