Player psychology is weird. Looking over the shift from #DnDBasic to #ADnD in terms of attribute scores and the 4d6 drop low looks like your scores are GREAT compared to 3d6… until you look at the charts and see the bonuses don’t start until 15 rather than 13.

You have about the same chance (+/- 3%) of a bonus on any attribute and of having at least 1 bonus in both. The difference is in chance of a penalty. Remove the Basic charts symmetry, have penalties start at 6 not 8, and it’s equivalent