A little late to the previous discussion: The Rule of Pride, IMO, should be treated as primarily an out-of-character game abstraction to make the game more interesting by stopping players from spamming the same combination over and over. The rule printed in the rulebook is not a literal in-character rule of the Dawi and the Runesmiths. The Warhammer rulebooks occasionally change around what counts for the Rule of Pride or which runes are "Master" runes (one per army), too. Facts in the game rules do not directly translate to facts about the setting, dwarfs aren't getting faster/slower in-character when one of their common tabletop models gets buffed/nerfed.