He's more of a point guard than a shooting guard, but he played where his team needed him to because Ullis couldn't play off ball. The highlights of the USA-Canada games shows how he can distribute.
He's a better ball-handler than Hield, and probably a better passer. I don't agree that he can't defend, either. I think his defense won't be elite, but neither will Hield's.
Murray averaged 2.5 assists per 40 minutes and 2.7 turnovers per 40 minutes.
Over his first four seasons Hield has averaged a combined 2.4 assists per 40 minutes and 2.7 turnovers per 40 minutes.
Practically identical PG numbers - though Hield's numbers got worse this year as a result of his extra offensive responsibility (which saw his turnovers increase by around 50%).
Murray might be a slightly better ball handler and perhaps a slightly better passer then Murray. If so there is very little in it, and it's pretty much irrelevant given that neither really has the ball handling or passing ability to be a long term solution at the PG spot.
Oh, and there is a big difference between 14 ppg and 20 ppg - the difference between Young's scoring and Murray's.
You should consider the minutes.
Murray averaged 22 points per 40 minutes, Young averaged 18 points per 40 minutes. Significant difference yes, but Young was also sharing the ball with Julius Randle - who is pretty much a black hole on offence.
Anyone with a basketball eye can see that Murray has finishing ability, floaters, pull-ups, and a three point game, all as the 2nd (?) youngest player in the draft.
Against college competition, sure.
What about when he gets into the NBA, where just about every single player he faces is going to be quicker, taller, longer and/or more athletic?
If he's starting in the NBA then he is going to have a physical disadvantage almost every time he steps on the floor, regardless of whether he plays the PG spot or the SG spot.
NBA SG's will shoot over him, and NBA PG's will blow straight by him. He doesn't even have the lateral mobility to be an above average defender at the college level - NBA players are going to murder him.