Average game score with Doke...
= 86.33
Average game score without Doke...
= 83.59
Season average...
= 84.27
He has some case they were better with him -- obviously.
For comparison, however, UVA's average game score was 95.11. TTU was 89.79.
They would have been incrementally better with him, but the idea he catapults them into the level of national elites with their weak guard play is pretty fanciful.
He probably could have helped them steal the extra game or two they needed to keep the Big 12 streak going, but I do not think he helps much beyond that.