Pretty sure Murphy was injured all fall with a foot and knee injury, so with that and the overall lack of practices due to covid, he probably was never really "in shape". He does have a nice offensive game, the defense isn't very impressive though!
To be blunt, Ryan Davis looked similarly plodding and foul prone when he arrived and though he is no Sam Dingba, has turned into a decent defender...hoping Murphy can do the same (better shape plus another year in the system)
Regarding school hanging on to would-be graduating seniors for their extra year. It's not going to be a reality for many schools in the AE. Maybe some sports are getting exceptions (UVM men's basketball is for now - and they're the only ones at UVM that will), but we're not going to know for sure in basketball probably until the summer. Portal days are still young, and roster movement for all schools in the league I'd still say is fluid.