I think the two of you vastly overestimate the influence that a WR coach has. Every snap that each receiver takes in practice, OTAs, training camp, preseason, etc is filmed and seen by the entire coaching staff and front office. Any of their unseen "talents" that arise in the daily WR meetings aren't going to move the needle. The sterile bureaucratic environment that you are advocating for certainly has it's place in the corporate world, but that's not identity of any winning football culture that I've ever seen.