Agreed it should stay. I have seen it abused a few times. Sore losers were behind 3 kills but even on towers and surrendered. Game wasn't even that long but it's a complete waste of time if at the 10 min mark my lane partner has started feeding 4-5 deaths. At that point most of us would rather cut our losses and requeue in hopes of getting a better team.
Don't forgot. Trolls do queue up with the sole intent of blocking your main character select, trolling you in game and trying to induce rage from team mates. I have seen them feed, call out team locations and afk in town while doing all of this. With surrender...the most you have to endure is 20 minutes and then 4 reports should follow.
BUT...what I'd like to see them do is if you que and miss the que, it should add 1 minute for the first miss, 2 minutes for 2nd miss and 5 min for the 3rd miss. Tired of of people queing and missing the que when it comes up.