I've noticed some things about this set in contrast to the Old School sets. For example, since all of the episodes on the old school sets were sponsored by 2, there were many 2 segments on those sets. But this set doesn't have any clips about the number 2 (unless you count Two Princes, which is really just about cooperation, not counting).
The first Old School set had a lot more bonus season 3 segments than the other seasons, and on this set, season 3 has the smallest number of clips out of the first five years.
Also, while Old School Vol. 1 had a mix in numbers of bonus clips for each season, Old School Vol. 2 had the same numbe rof clips for each season, with the exception of season 6, which had three more. Most of the seasons from the late 1970s are represented with only one clip (seasons 6 and 9 are the exception, with three segments each).
So far we haven't had an Old School Vol. 3, or any 1980s equivilent, but this set seems to make up for it a bit. Seasons 11-14 are all represented with quite a few clips each when compared to seasons 6-10. Afterwards each season of the 1980s is represented with either two or three inserts each.