So my warrior is the only character I've enjoyed PVP on, buy cheap wow accounts and so I leveled him with the intention of doing some casual PVP and maybe running LFR a bit. Can someone who understands the changes here help me out: does this mean that PVP gear, even capped at 496, would be suitable for LFR raiding? I'd really rather not have to deal with two sets of gear if I can avoid it.
Monks and druids can use pvp gear as tanks and do reasonably well. Paladins and death knights can to a lesser extent because they benefit well from haste. Warrior tanking in pvp gear just isn't going to work.
If you happen to be geared in full conquest 496 gear, then you should be fine in LFR. Theoretically, your conquest set should have the same base secondary stats as 496 raid gear. That said, there are a couple issues that you need to address.
The first is gems and enchants. Chances are you're gemming straight PvP power or resil, which is completely useless in PvE, not to mention a few of your enchants will be completely stripped of their value.
Second is hit and expertise capping. For PvP, you should only be capping them at about 3%. PvE, you need 7.5% to put out your full amount of damage.
Yes, you can LFR in Conquest gear, but you'd be gimping yourself in a few areas. If you have that kind of gold to throw around, then by all means go ahead. If not, good luck performing optimally.
I hadn't even considered gemming/enchanting. how to buy WoW gold I certainly don't have the gold to be flip-flopping like that all the time. Guess two sets of gear would be the better option.