While I'm sure this is true for McD (while a lot of teams, HC's & OC's would attempt to beat a round peg into a square hole), I think a significant problem may arise if the offense that best suits a rookie developmental prospect needs to be radically different from the offense that Tom runs - while Tom is still on the roster.
The offensive roster has been more or less built around "Tom's offense". The route concepts, sight adjustments, even the blocking scheme may need to be significantly altered to optimize a distinctly different QB "style" and skillset. Given the limits on practice reps, it could be difficult, not to mention confusing to the players, to thoroughly "teach" two different systems simultaneously.
In the short term, it would be easier for a rookie QB if his skillset could fit into our current offense with minimal adjustment to our scheme.
After Rosen, Darnold, Mayfield and Jackson, Mike White is the QB who I think the Patriots should target.
I agree with Mayock and have him closer to the top tier instead of Lauletta, and Nick Caserio personally attended WKU's pro day which could be a sign we're strongly considering drafting him.
My reservation with Lauletta, and Woodside to a lesser degree, stems from projecting his trajectory. I think he has a high floor but a low ceiling. When I watch him, he does many things well, but nothing that stands out and questionable arm strength. Lauletta would have the weakest arm strength from our past few QB selections. He's a safe pick who would probably be a good QB in this league, but not a superstar with a dominating presence to takeover a game.
Mike White, imo, has a floor that's equal to Lauletta but a much higher ceiling. Oddly Lauletta has gained all the attention with his Senior Bowl performance and the lacrosse/Navy connection with Belichick. While White also had a great Senior Bowl game, he has similarities closer to Brady with his baseball background, strong arm, and the best eye manipulation of all of the other QB prospects.
Matt Waldman did a fantastic video on White's eye manipulation and you also see this in other games with many of his passes.
After the Alabama game in 2016, which was his second start ever at WKU, White showed tremendous growth throughout the season with eye-popping numbers. White took a hit in scouts' eyes this past year with his performance, but his numbers were still great and nearly the same as last year's stats.
The big difference was the loss of Forrest Lamp and a terrible O-line; a non-existent running game (WKU ranked dead last in FBS rushing offense) and a big decline in playcalling from Jeff Brohm's offense to Mike Sanford's.
He carried WKU to a .500 regular season record and a bowl game with not much help.
And when projecting him, White with our team talent and Josh's playcalling would probably thrive and have performance levels/seasons closer to his 2016 season rather than his Sr. year which was still good in a season with many disadvantages.