I don't believe Rose would've signed either if I'm honest mate. It was reported that we had scouted over 800 RBs and it was decided by Ole, and the recruitment team that AWB was the one. I don't believe Rose, would've signed him due to what is expected of fullbacks in his system and how important they're. I think someone like Max Aaron's would likely be favoured by Rose, or even Nagelsmann for that matter due to the Norwich player being noticeably better at distributing the ball and having the ability to play as a wingback which would inturn give someone like Rose, tactical flexibility and extra strings to his bow.
I don't think he'd sign Maguire due to our midfield and attack being so blunt, especially the midfield. Rose, imo would quickly realise that for him to implement his high octane style, he would require the midfield and attack to be of a certain standard. And if the bulk of the budget is spent on a fullback and CB, it would severely limit his ability to implement his style. So I fully expect the club to adhere to his wishes if he was given the job.