There's obviously some glaring holes but I don't think I've ever seen someone who was this good at passing that didn't end up being good in the NBA. At least, no one comes to mind.
Perhaps it was MDA's offense that inflated his stats like many PGs before him but in the very few games he played before the Lakers he did similar things.
Marshall's first official start in the NBA came on March 27, 2013 against the Utah Jazz. He had 13 assists in that game, his first game to record double-digit assists. In three starts, he totaled 37 assists.
Out of the 54 games he played for us he had 25 games of 10 assists or more. It's just something you cannot ignore....
So considering this guy has only 2 years of NBA experience and he's already recorded this many games with over 10 assists I don't think it'd be wise to just throw him away. Keep him on the bench at a minimum. If you can get a better PG where it financially makes sense for us then I'm all for that.