Really like the idea, only issue I see with it is the base stats, as if they aren’t made to match the best PvE gear, then the PvE gear will most likely still be better. This could be solved by making all PvP armor have a guaranteed affix that gives it more defense vs players up to the best PvE armor set (maybe even better because the PvP armor should be better in PvP than PvE can be). This means that the PvP armor in PvE would be equivalent to normal level 30 armor (if you are level 30). This guaranteed affix would be the thing that decides the gear’s tier. For example, if you have a level 30 (completely forgot the amount of attack on it) a tier 1 PvP weapon would still have the same attack as a level 30, but would have a stat like 200 bonus attack vs players (Tier 1) and tier would have 400 attack (Tier 2) and so on. As for other affixes, only one I could see being an issue is %honor point gain, as that is always going to be taken to reach high levels on the leaderboards.
Only issue is that PvE +4 will still work better in PvP than PvP +1 just because of base stats, unless they are changed like PvP armor to have have same base as level 30 but a guranteed affix that gives the piece it’s tier. I don’t think this would be too much of an issue, because if higher levels of PvP armor were made better at their job than PvE armor, then the only thing that would happen is people with good PvE armor wouldn’t care to get the lower tiers of PvP and only care for the higher tiers.