This might take some time but what if ability effectiveness was based on your totally attribute percentage so if you 300 focus 150 con and are using a dex, strength or int weapon it isnt nearly as effective as a “utility weapon” and obviously this would go with all other weapons and attributes.
The reason this has become an issue in large group pvp is because creating opportunities is key to large group pvp. Just look at the large group meta great axe 300 strength with ice gauntlet grav well isnt op but it is good at creating opportunities and if the opportunity is created you can ice shower someone before they have a chance to escape not saying this shouldnt be possible but a bruiser using an ice shower cc ability should not be nearly as effective as someone who is actually speced for it, dont get me wrong i think ice shower needs a change in general because its so buggy and while the root isnt that long on paper between slow and the root and the duration people will just drop another on you or if your in light or medium armor youll be dead before you can escape.