Bryce Cartwright is a good 6th man on a decent major conference team, nothing more. You are basing his worth on total assists, which is not a logical evaluation. You need to look further into his stats to determine his value.
Efficiency (Assists:turnover) Bryce had 1.78. He was worse than: McCamey (Illinois) 2.08
Nolen (Minn) 1.79
Darius Morris (Michigan) 2.22
Jordan Taylor (Wisconsin) 4.2
Tim Frazier (PSU) 2.1
Craft (OSU) 2.1
Not only is he inefficient handling the ball, he is a very poor shooter, not a mediocre shooter like you claimed.
Look at his PPS totals in comparison to other Big Ten guards from last season:
Cartwright: 0.99
Battle (PSU): 1.29
Lucas (Mich St): 1.28
Morris (Mich) 1.28
McCamey (Ill) 1.36
Taylor (Wis) 1.38
Craft (OSU) 1.42
Frazier (PSU) 1.3
Nolen (Minn) 1.51
You need to at least do one of these two items well to be a decent guard in this league. You, like ISU fans with Garrett vastly overrate him.
Garrett had a PPS of 1.07 and A/T of 1.84. He is overrated by his fans but still better than Cartwright.