The main stats that separate PvP and PvE gear are:
1.) Lack of any +hit on melee gear (which is the primary stat for raiding). I've used my S3 rogue gear to raid and my damage sucked due to that amount of missing I was having. I was constantly out-dps by a combat T4/5 rogue using the talon/ZA sword OH while I was combat with dual S3 swords.
2.) Same with +hit to spells for caster gear
3.) The lack of decent intellect, spirit, and mp5 on healing gear AKA no endurance in boss fights.
4.) Resilience
The problem is Blizzard is mixing PvP and PvE now with the badges and Tier pieces. People will start PvEing for PvP pieces (some of them already are, ie. warglaives, trinkets, DPS gear). This will give the hardcore PvEr the advantage above the hardcore PvPer. They maxed out resilience in season 2. Since then, hardcore PvPers (like me) are trying to maximize their DPS. And the best (and only) place to get that type of gear is through raiding.
1.) Lack of any +hit on melee gear (which is the primary stat for raiding). I've used my S3 rogue gear to raid and my damage sucked due to that amount of missing I was having. I was constantly out-dps by a combat T4/5 rogue using the talon/ZA sword OH while I was combat with dual S3 swords.
2.) Same with +hit to spells for caster gear
3.) The lack of decent intellect, spirit, and mp5 on healing gear AKA no endurance in boss fights.
4.) Resilience
The problem is Blizzard is mixing PvP and PvE now with the badges and Tier pieces. People will start PvEing for PvP pieces (some of them already are, ie. warglaives, trinkets, DPS gear). This will give the hardcore PvEr the advantage above the hardcore PvPer. They maxed out resilience in season 2. Since then, hardcore PvPers (like me) are trying to maximize their DPS. And the best (and only) place to get that type of gear is through raiding.