This wouldn't be a concession IMO, its how the the subclass is supposed to work in 5e. Where would the concession be? I don't see one. Everything in previous versions of D&D pre 5e still existed, and still exists in 5e in their history books for them. Being 5e doesn't magically negate the existence of content pre 5e. So you ask where is the line?, the line is drawn at official D&D content. As a side note if a new version negated content of the content under it Baldur's gate 1 and 2 would have a lot of explaining to do in Baldur's gate 3 using 5e rules.
Last edited by soulstalker; 19/10/20 02:35 PM.