I think he's also finding it a little difficult finding his place on the offensive pecking order. He went from one of the highest USG players in the country in college, to being the feature option in SL to now learning how to play off 2 stars and 3 excellent secondary scoring options (Huerter, Barnes, Monk) that all command USG.
Guys like Paolo and Ivey got the keys to their team right away. Murray has to actively carve out an offensive role vs very good offensive players. I'm not worried, he's too smart of a player to not figure it out.