At this point it is pretty common knowledge that tankiness in all its forms (mitigation/heal stacking) is out of tune in pvp. While some classes are bigger contributors than others, for the most part it is extremely easy to build a “well-rounded” dps build that is still very tanky. I myself have some suggestions to help reduce it
1). Nerf undeath. There is already a post here on it so I won’t get into it too much. Every class takes it for a reason: it’s simply too broken to pass up
2). Utilize battle spirit. There are a lot of ways you can do this to accomplish reducing pvp tankiness, here are some ideas:
-make battle spirit reduce max health by a flat amount to counter health-stacking builds
-make battle spirit increase core combat ability costs in order to reduce sustain. This way players need to either sacrifice tankiness or damage in order to have a build that is functional
-adjust the reduced damage taken from battle spirit to be lower. Perhaps between 45-50% would be a good start, instead of the current 55% I think it is
3). Incentivize building into max-stats again. With the current damage formula, running more than 23k max stat (stamina/magicka) or so is simply not worthwhile. It adds little to nothing. This causes players to instead dump all their points into health. If max-stat contributed more to a build, it would cause players to actually have to choose something. Max health is simply the superior choice at the moment
4). Probably the least popular one, remove cross healing again. It would also help performance issues
5). Re-standardize set bonuses. Many once popular damage sets (mostly ones that stack weapon/spell damage ie fury, nma, bsw, ravager, clever alc etc) are simply not strong enough. Proc sets offer more in the vast majority of cases and eclipse these sets. Set balance is very much out of wack, and is worth considering a revisit imo. There is a reason the most popular setup is just masters dw/vate ice/maarselok or zaans. It doesn’t feel fun feeling forced to use at the very least two of those options to have a “competitive” build. Not saying other setups cannot work, but most are just inferior to the copy paste proc build
But anyways yeah. Something needs to be done about it because at this point there have been very little actual balance changes that are meaningful/impactful that are going to fix this issue