Check out the patch notes for the v20 Lovely Update here: http://maplestory2.nexon.net/en/news/article/55909/lovely-update-v20
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And that Bryan guy who begged them not to change anything in the tweet reply, because players need to learn to play, is a popular Chaos Raid run seller. If anything changes, he could lose those millions of mesos per run he sells. Pretty scummy. Wants players to learn but takes their money to let them afk.
I would say increase the time by 5 minutes and keep everything the same. Maybe that's just me on my end. As for the Chaos Raid seller, it shouldn't be a thing in the first place. I rather want people to learn and progress day by day than to let someone cheese their way through afking.