I gave them all small bonuses to military/social production, research, economy, and pop. growth to help them stay semi-competitive during the colony rush. In my ongoing "test" game, they've fallen into three groups that I think of as:
"Major minors" (Dark Yor and Lentzlandians) - on a par with the smaller major races,
"Minor powers" (Carinoids, Scottlingas, Paulos, and Jessuins) - minors with 1 or 2 colonies, good-to-fair abilities, and intelligent behavior, and
"Fools" (Akilians and Snathi) - the only minors that are like (or, more precisely, were like - they're dead) the normal unmodded minors.
There's also definite variance between the minors in behavior. For instance, even though the Lentzlandians are much larger then the Scottlingas, the Scotts have a much better military and have been battling for the fifth military rank with the Dark Yor and Korx for some time.
The super abilities are working, all right. Right now the "League of Non-Aligned Worlds", the Thalans, and my Krynn are all at war with the Drath after the Drath attacked the Carinoids. The League and Thalan are also at war with the Korath, although I passed on that one.
My only concern is that even though, as mentioned, the Dark Yor have a strong military, they aren't doing anything with it. My guess is that it's because they have a score of 30-something (they're ranked between the Korx - 40-ish - and the Iconians - 28 or 24 at last count). Their military probably should be rated higher, but the Drath, Thalans, and Korath are all so huge that they're artificially deflating everyone else's score - rather like Dread Lords in a way.