Just Delete PvP at this Point

[Divinemights]

I can't say how far in the past your claim is when it didnt had the EXP reward yet, since i only exist since Stormblood, but if that was during Heavensward, i recall that PvP back then used to be at its peak in many aspects including Job design so it would be understandable if People would queue there just for fun, if the gameplay is. But as things currently stand, Frontline mainly exist just for the Daily EXP dose and thats all there is to it.
Also, my claims come from the EU side of things, and most People there overall dislike PvP and wouldnt even touch it with a stick if it werent for the EXP.

I will straight forward telling you right now 6.1 will not work for your EU datacter because the people there seems just don't like the concept of Player vs Player.
The problem is always with the people, not the system.
As far as SE concern, they have a healthy PvP sector and they never aim for e-sport like Blizzard did.
Whatever happened in EU region due to its people do not equals overall performance.