D&D has had this issue with every edition except 4E (and arguably 1E but I would argue against), where, essentially, it lags 5-15 years behind where modern, intelligent, reflective, considered design in RPGs. I'll give 5E its due here - it was one of the less-laggy ones. Bounded accuracy and Advantage/Disadvantage worked out, and were modern, but a lot of other elements were retrograde because of the apology edition elements, and honestly so far 1D&D looks like it's a curious combination of one of the weaker elements of 4E (obsessive standardization - for example of subclass levels and spell preparation and lists), together with a lack of any real vision re: improvement. I'm sure it'll be "fine" but it's not going to really be any advancement on 5E, and I'm not sure it'll even hit the low bar of "clean up", just a different direction. Black Flag seems a little more advanced, but so far doesn't really seem like it's doing anything daring - I would like to see their class/subclass visions though. Anyway, I'd like to have seen a much bigger jump, one that more embraced how D&D seems to increasingly being played (i.e. more heroically), rather than just rearranging deck chairs.