The biggest issue I've seen is that it's never "Hey, you should try this buff with this rotation" or "If you stack this and this, it increases x by y", it's always "Zomg I m teh 1337 DPS dood an u suk! U needa hurt more thing narf POIT derp!"

People should take the time to learn their jobs inside and out, learning what to use and when, and when it's better to stack everything for a huge spike, and when it's better to cycle through for extended high damage.