Yeah I think we have a large enough sample size to tell at this point what 3 of the 4 will bring:
Murray: pros - some 1-on-1 offense (floaters/layups), some defense (steals) cons - suspect shooting, suspect offense running, some turnovers
Mills: pros - great shooting when he's hot/off ball spot ups, some offense running, knowledge of The System, FT% cons - sometimes can't run offense well, lack of size for defense/gets beat often
Forbes: pros - higher percentage shooter, clutch, some skill to get buckets in 1-on-1 cons - small defensive matchup vs. most NBA SGs, FT%, can't really run offense
White: not sure at this point. From his college tapes he looks like a smaller James Anderson type. A tad slow but can get some buckets. Ran his college team so probably ok with the ball in his hands
BP3: pros - not sure at this point, average defense, average size (sadly much better than the rest of the guards besides Murray/Manu) cons - doesn't seem to know the offense/seems to get lost out there, doesn't play big (I think he's about Westbrook's size but doesn't play big like Russ)