Make one for all require 4 players pick a champ for a guaranteed pick (same as surrender)

Just remove "Majority" and make it a true lottery.

If 4 people pick a champ, and 1 doesn't pick that, then it should be 80/20 not 100/0

Without premades maybe, definitely not in 4 man premades. That would be unfair to solo players.

3 people just nominated morgana in the OFA champ select, another guy lux and me just happened to click Sion before the time expired. Let's just say that those 3 AP Sion's in my team where actually pretty good..........

I do, though, agree with your notion. +1

I'd say just completely remove the "majority". If one person doesn't want to play the champ that the other 4 people picked he should have his 20% chance of getting his champion.