Promos are pointless when you lose so many because of AFKs.
It is absolutely ridiculous that I get handed a loss in promos when I have AFKs on my team. It's ridiculous that it happens so often in any game, but especially when this "series" is supposed to be TEH TROO TEST OF UR SKILLZ. Institute some kind of protection against late game AFKs/rage quitters or just get rid of promos altogether. What's the point? If people can win consistently enough to get 100 LP despite all the AFKs and totally bullshit matchmaking just send them to the next rank.