Since subclass I've seen many run the same one shotting combos. Mostly being with contingency+incap and or deep fissure + riposte cp into spectral bow if the person isn't dead yet. These types of combinations which allow killing someone in just one or two hits isn't healthy for PvP imo. The worst part is that they are not even gankers. Only a ganker should be able to do that in exchange for being squisy (not even gankers imo should be able to one shot people). I miss when you had to pressure players into killing them with combos not killing them with one combo.
I enjoy that we have a damage meta for once, with many strong combos with subclassing. But some combos needs to be balanced and not allow to kill within a second. Changing riposte CP would be good start. Assassination skill line is way to strong and everyone uses it now. Specially spectral bow.
Critical damage have become way to high since hybridization. Forcing everyone to run rallying cry so you dont get hit with 20k spectral bows.
Sadly I don't think subclassing and hybridization was good for PvP. Before we used to have a stamina and a magicka version of every class and everyone had their their favorite versions. Now that was taken away from us, our favorite classes. I understand every game needs to develop somehow but I would've rather wanted a new map, a new class etc.
PvP population is so low now compared to what it used to. Perhaps working towards crossplay within the same regions. Having a main campaign and a vengence one? Vengence still needs work though, specially when it comes to sustain. Not fun when you use your spammable a few times and you're already out of sustain.
Also idk how much it costs, but updating your server hardware literally fixed the lag in Cyrodiil even though it deteriorated slowly after every patch/update. Perhaps updating it more often is an option?