If there's something you don't want to play, don't pick Fill if you want no chance of getting it lol. They are considering increasing how many roles you can queue for in the future, meaning you could pick 3-4 lanes and leave the last out instead of picking Fill.
I don't know why they'd let you pick your pick order. They are already improving how it's done to make it more fair, so the first 2 picks and last 3 each have benefits; the first 2 of course get priority by picking earlier, but the last 3 get to have 1 ban each. Either way you get to have a say in counter-picks.
As for the random ban thing...I don't understand what you're saying at all. Random bans is a shitty idea. It undermines pick strategy by taking control out of the player's hands.