item upgrades are fine actually, for justice , valor and honor really, but it is absolutely horrible for conquest gear due to obvious reasons.
If they dont want raiders to be forced to cap max valor everyweek .. why not just give more valor for each boss kill or
they need to come out with something like a scenario within a raid, like what we had in ICC (e.g. lady deathwhisper a random add dude spawn that needs to stay alive throughout the fight or u fail the objective or the stone giant thing( the stone giant one sucks though it didnt happen during boss fight )) in order to get some reward. That was kinda challenging and new back then, didnt know why the idea got scrapped later on in cata.
They could grant some special item / currency that allows u to upgrade ur item if u manage to complete the objective while killing raid boss , makes the encounter more interesting and less dull. (for 10 / 25 raids only , not for LFR)
still waiting blizz to remove 10 and 25 and make all raids 15 man ..