OK so i recently got into a debate with a couple of my friends about dps splitting. honestly in my opinion i don't really see the issue with it. I currently have a level 60 paladin and a lvl 54 warrior. my two friends tried to convince me that dps splitting takes longer than focused attacks but honestly i have to disagree.

Below is my reasoning (Too long to have all on one post)

http://imgur.com/ZHdaUhc

In all my time as a tank i have never once had a problem with dps splitting. the only times i can see dps splitting doing more harm than good is if the tank lost aggro on the adds or if the healer couldn't heal through the fight. Is there anything im overlooking and what is everyone's opinion on dps splitting?