I've been wondering about this for a bit now, and I'll be discussing this with the team, but I think Syrris is right where its more a contextual thing and "Lowered" would be better wording
I think you need to start with how the "price" of an available leader is set in the first place. Clearly, it cannot be just based on the sum of the attributes since the second and fourth leaders both had attributes totalling 20, but the second leader had a "price" of 267 while the fourth leader had a price of 373. Do the other capabilities of the leaders also play into the "price"? If so, how?
Whatever the answer, the bottom line is that what the players see must make intuitive sense or be explainable mathematically.