A fascinating discussion.
Keep in mind, VL was the first coach to utilize 8mm to record practices and games from various angles. When he was OC for the Giants, he had Wellington Mara take Polaroids of the defense, put them in a sock and send them down via a wire. He was the first to do so.
VL may/may not have BBs brains but in terms of leveraging technology to gain advantage, he was an innovator.
He was also incredible at evaluating talent.
IMO if a coach or player is great but from a different era, if you give them enough time and the tools of the current era, they will still be great.
Same is reversed. If you dropped BB in the 50s and 60s he would still kick ass.