My way of thinking was that 60s is borderline rotation players, 70s is good role players, 80s are borderline allstars and 90 is hall of famers. I figure none of these players will be all-star quality their first year because they are all a bit raw. Your point about being in-line with other classes is good, I generated a lot of random draft classes just now with high 70s players. In my next update I'll bump some of the more nba-ready guys up to 78ish.