i personally thought dialog was really clunky what with the one-and-done style vs nested trees a la Skyrim or Disco Elysium or Mass Effect or like literally any other RPG i've played in the last decade

edit: also nat 1's being failures in skill checks, absolutely not a thing in 5e; skill checks are additive so even if your rogue rolls a 1 on acrobatics they still have a +12 to it so you might pass the check. so that was also clunky and annoying.