Wod system of pvp ilvl was super alt unfriendly. I can't describe how i hated it. In legion i can jump with fresh alt into arena or bg. In wod it was hell to fight geared players as fresh alt espesially in arenas.
Even when fighting 1400 stucked players it was very hard (but winable)
There will never be good gearing system in wow. Every single one have something people dislike.
Gear should play role in pvp but only in character customization so you can choose what stats you prefer but in terms of ilvl there should be little difference between best geared player and worst geared players so we can't talk about skill not gear