From what I've seen of other breeds, helping people match etc. I'd say RID and TB also have issues with Scp and tend to be weaker in jumping. AA seem to tend toward Scp issues as well, probably because of TB influence. WB seem to have the opposite problem and be commonly weak in Mv/Int, meaning they're weaker in dressage. I can't remember if I've seen this sort of pattern in X, but they might have one as well.

Eyrie of the Stars said:

When it comes to EEE+ ratings, the breeds with smaller gene pools, especially KNN, RID, and TB, which can only breed to themselves, get rather inbred. This causes certain sets of strengths and weaknesses to become prevalent in the breed. KNN have been weakest in Scp/Str for a while because of weaknesses in their first WWW studs. Now they're starting to swing toward being weaker in Int because of the drive to boost those other traits, but I'd still say in general they're weakest in jumping.

From what I've seen of other breeds, helping people match etc. I'd say RID and TB also have issues with Scp and tend to be weaker in jumping. AA seem to tend toward Scp issues as well, probably because of TB influence. WB seem to have the opposite problem and be commonly weak in Mv/Int, meaning they're weaker in dressage. I can't remember if I've seen this sort of pattern in X, but they might have one as well.

Warmbloods and Knabstruppers are given a movement trait boost. Thoroughbreds and Sport Horses are given a speed trait boost. Anglo Arabians and Appendix Quarter Horses are given a slight boost in intelligence and speed. Irish Draught Horses and Irish Sport Horses are given a slight boost in heart and strength each. Sport Ponies get a boost in speed and intelligence.