Right now everyone who plays pvp can agree that defiles are too strong in their current form.
They are very easy to get, really powerful and hardcounter the only things which will give you health back or keep you alive outside of shields.
With the CP tree befoul and major + minor defile you can easily reach a 70% healing debuff on your target with 100% uptime.
When you look at the normal healing values of skills while in combat and fully buffed in pvp and then mix in defiles you realise really fast why they are overperfoming at the moment.
With major defile only a 3k vigor tick gets reduced to 2k (3k is a crit with high stats + investment into healing received + done for most builds)
If we now fight the 70% defile build this 3k crit (our absolute maximum) gets reduced to 900 pitiful health we get from our main heal.
This can be out damaged by:
A light attack with DW on a magicka spec
Almost any dot in the game
Every spammable
A bash
Etc.
Meaning with no effort you can completely negate the main healing of stamina specs.
Now we look at things like BoL which heals for 10-12k on potent healing builds this gets reduced to a laughable 3-3.6k healing. On an offensive build that has all healing buffs active and features good stats which supplement healing
What makes this even more absurd is how little opportunity cost you have for increasing the effectiveness of defiles via cp.
Both healing done and taken are in the offensive or defensive cp trees located, meaning if you want to boost your healing you are losing either lots of damage or damage mitigation which makes the effectiveness of the investment rather low as you increase your healing yes but you also eat more damage.
Befoul however is located in the green cp that has little effect on your build past ~150 points spend as you already have all the cps you need for your build. Now you still have access to 100 cp and you can use them on befoul without losing damage or survivability. Further investment in the other cps only give you diminishing returns so it's much more useful to just put everything into befoul.
What makes defiles even stronger is the ease of applying them in contrast to getting the heal buffs.
Only one class has access to both major and minor vitality and major mending and only with a rest staff equipped (nightblade) and in order to get those buffs together for 3 seconds you have to do a fully charged resto + using an ultimate that costs 150 ult (soul siphon)
While every class has easy access to major defile at 100% uptime via: duroks bane, Cyrodiils crest, reverb bash, lethal arrow, diseases damage enchant and that's only the non class skills.
Minor defile can be applied via poisons or fassalas guile.
I'd like to see the following changes: all current non ultimate versions of applying major defile are turned into minor defile.
The value of major defile is reduced to 25%, minor defile is reduced to 10%
Befoul CP is moved to the atronach and magicka/ stamina light and heavy attack damage cps are merged into one cp.
Also befoul is reduced to 45% down from 55% at 100 points spend.
The empty cp at the green tree can be changed to:
Reduce the effectiveness and duration of snares and immobilizations applied to you up to 25% (at 100 points spend)