I've been in a 10m for all of MOP. While doing our T14 we had 6 prot token 4pcs (that's main spec and off spec) between three players before we even saw a single 2 piece bonus for a single dps. I would like to see a smart loot drop system where loot drops a bit less based on how often it drops. Meaning there's more round robin with the drops. There's quite a bit to be upset with in 10ms at the moment, such as raid balance from fight to fight, especially in ToT. Megaera (10) 263 (6.44%) vs Jin'rokh the Breaker (10) 3975 (97.35%). I mean I want a challenge but having an ez mode boss that nearly every 10m has killed and then 4 bosses later only 6.5% have killed shows a massive imbalance in fight to fight difficulty. (I am aware that there are MANY other reasons to this, like some raids didn't raid as much etc, it's just a general blanket statement). This will lead to more problems down the road in heroics due to the terrible loot distribution. In 10m you have a very good chance you're DEing drops on the second week and in some cases both pieces from multiple bosses get DEd on the second week. Top this with HAVING to do "optional" dailies to get the 90 coins for a chance at a 3rd drop... well, I just think the system is simply not working out.
With all this in mind, Blizzard does need to make the system work in such a way where the content needs to be "farmed" to maintain subs, it's just good business practice.