1. would obviously be brilliant...other than situations were you're vote kicked during a DC and try to get back into the group (I've been in this situation and "in-progressed" myself back into the group that kicked me for DCing)
2. However can present a problem with overwhelming majorities (3/4 premade or 6-7/8 premade). The extreme case is 3/4 premade or 7/8 premade. You're saying that 1 random should be able to guaranteed vote kick a member of the 7-man partial? The result of that would then be the remaining 6 vote kicking the single and trying to get their friend back in in-progress assuming #1 wasn't implemented yet. Majority always rules. If the player's partymates are fine with his behavior and vote No it's up to the single person to decide if they want to stick around or not.