My main problem with auto fill
In theory i get it. Auto fill is there to improve queue times and get people into games quicker. That's all great, but what about the people who don't have all the runes unlocked and rune pages for every set up they want. We are given 2 rune pages to start you have to pay 6300 ip for an extra page i play a lot of league and still it would take me a week maybe 2 of playing all day to get enough ip to get rune page and a couple runes. It just doesn't seem fair to have such a hindrance to game play by gating the number of rune pages and runes you can have. Now I know people will say that you can buy rune pages with RP but that still doesn't change the fact that you can't buy runes with RP and most quints cost around 2k IP which is more than the casual player will get in a day.
So I guess the point I'm trying to make here is that if riot is going to improve queue time by forcing people into other roles than what they are comfortable playing then the least they can do is make it so that runes and rune pages are more accessible.