You don't let them play?Off D&D? I guess I’d have to interact with my kids or something.
They fid, it's quite regular and predictable. They Ground level designed the math around Spell Slots and HP, which are convertible and underlay every game component. It's secretly point buy, and they even slipped the basic formula into the DMG.* I have no idea if they did or didn’t, not having bought any 5Ed.
March! Lovely, just in time for my birthday. SotS is one of the few recent games I bought the dead tree edition of and I'm quite looking forward to it. I think it would do dungeon crawls under Eversink quite well too.Because I am apparently shameless, I'll mention the game I co-wrote for Pelgrane Press. Swords of the Serpentine is classic sword and sorcery using the GUMSHOE system, tuned for cinematic action and competent heroes. It's a little more about ruling kingdoms than it is dungeon crawling, but I think it may qualify. PDF out now, books should be out in March.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.