I think we're overthinking it, guys. Feige wanted his cake and to eat it too. He wanted to reboot Daredevil. He wanted to make his own MCU Daredevil that could potentially crossover into the films and trade banter with the Avengers. But Feige also wasn't ignorant to Charlie Cox's universally lauded performance as Matt Murdock. He COULD have recasted Cox but he knew the decision would receive backlash and pushback. Heck, Feieg himself was probably a fan of the original Netflix series even if he didnt produce it.
Feige figured bringing Cox and D'Onofrio back would get buy in from fans and allow them the legroom to do what they wanted with the character because, hey, the actors you love are back, thats all that matters, right?! Charlie and Vincent were going to play NEW but familiar versions of their characters. I'm willing to bet in this original incarnation of Born Again, Daredevil and Kingpin will have had some vague antagonistic history together that would have been alluded to in the show and it would have been up to the viewer to determine what that history was. But they were never going to directly reference the events of the netflix series.