This is definitely a problem with player mentality. I actually did a run with our FC to help someone complete this run for the first time. The person was the tank, and after remembering my nightmares with this (I can't tell you how many times I got yelled at my first PUG run of this because I did this wrong, or that wrong), I was taking the time to explain what to do, and the person was watching their cutscenes.
Needless to say, people got impatient, started running to places they knew better than to go to, we ended up taking far longer than expected. I personally died 5 times in the run trying to save people, or to prevent control loss from people getting ahead of themselves.
And that is not unique. When it comes to CM and CP for that matter, people need to remember that sometimes it's a persons first run. They need to step back, take a minute, and walk the person through. It doesn't matter if it's your 10th run or 100th run. Yes it's tedious, but for them it's new. They don't know where to go. They may not know how to aim the canons, or line up the mobs, or to return at a specific point rather than run back.
The timer has nothing to do with it. It only takes 10 extra minutes (on a dungeon that can be run in 30 minutes, that's not horrible) to help someone learn it for the first time. And while some people (I took 4 runs before I had everything down to tank it) will take longer to learn than others, we all end up spamming these things to death. But we should at least have the courtesy to remember what it was like the first time.
____________________________
http://na.finalfantasyxiv.com/lodestone/character/729735/