How so?

Versatility.

IMO Dinwiddie will be the primary backup at PG, 2G and SF ... all three.

That makes Dinwiddie a 6th man in name only.

When you look at the stat sheet following each game, IMO Dinwiddie will be close enough to Kyrie, LeVert and Harris in minutes to be viewed as a quasi starter.

PG Kyrie/Dinwiddie/Hands

2G LeVert/Dinwiddie/Prince

SF Harris/Dinwiddie/Prince

PF Jordan/Kurucs/Claxton

C Allen/Jordan/Claxton