-1 While I understand your view point, it only exists in a world where the battalions are all perfectly run and have perfect successors. Some times battalions need change from the outside, for example Fizzik's case. Changing the rules to this would allow shit battalions to remain shit because it would be based off of popularity within the battalion. The best choice for next BCMD is necessarily always the most liked member. Also XOs can be pretty ass and have better candidates.
Source: am a certified retard XO