ATHENS — The long and short of it was that Georgia’s leading scorers, in a 79-67 win over Robert Morris on Tuesday night, could have played so much better. The long, 6-foot-8 center Yante Maten, scored 20 points, and the short, 5-10 guard J.J. Frazier, scored 17, without impressing their coach. “They ended up in double figures, but neither one of them played as well as they have,” said Coach Mark Fox.