“Gear is gear” will never work as long as you have LFR, Normal, Heroic, and Mythic.
For “gear is gear” to be a thing you need to essentially trash everything but mythic.
That would not be a good thing.
Small, incremental upgrades with a chance at good luck balanced by a currency-dependent deterministic path would be ideal. So for example, you could bring back titanforging, cap titanforging at mythic ilvl, and allow valor to increase the ilvl of a given item similar to how honor works. For this to properly work you’d have to greatly increase or remove the valor cap.
Then you could leave PvP completely untouched.
So let’s say you do a +15 key and you get a big forge: bam, you have a 226 trinket.
Let’s say you do a +15 and get nothing or just the baseline item: You can then go to the valor vendor and purchase the item directly, or purchase an ilvl boost for that item.
This would have the following benefits:
1.) PvE players could still benefit from doing rated PvP, but boosting would be much less worthwhile. This would clean up the 2v2 bracket.
2.) PvP players could still hop into PvE content (and vice versa) but would possess no inherent advantage or disadvantage aside from that inherently carried by gear and skill.
3.) It would allow all the upside of RNG (yay, I got lucky!) while removing the downside (wtf 12 weeks and no weapon???!!?!!??).
4.) It would provide bad luck protection.
5.) It would incentive players to do content below their skill level in PvE on the off-chance they get a massive reward. Right now high end players have almost no reason to do normal/heroic raids or lower keys, which means pugging this content is more difficult due to a lower skill pool. If we can randomly get a massive upgrade (even if it’s very very rare) then suddenly the incentive exists.