Currently, zerg PvP's meta is not fun, nor is it balanced in any way. It also lags sometimes for people even on top end PC's depending on the zerg size(s).
On top of this, by balancing around(and not even creating good balance) zerg PvP, you have completely destroyed roaming, 1v1, and small scale PvP. There are far, far, FAR too many completely gimmicky impossible to kill, or 1 shot builds in WvW compared to sPvP.
Energy sigil being 2x as strong, endure pain lasting 2x as long are just some examples of making players much harder to kill in WvW than SPvP. What this does is encourage people to play brick wall builds that, if attacked, can easily run away spamming invuls/dodges/blocks/evades until they get to their tower. If you are not fighting this type of build, you're fighting some player who can immediately 1 shot you or perma stealth forever while slowly killing you with zero ways to interact with them. This makes roaming very boring and unsatisfying.
By balancing around zerg PvP, you have not created fun zerg PvP, while at the same time you have created completely unbearable roaming and small scale PvP to the point where very few people want to do roaming or small scale due to how many unfun builds there are that either cannot die, can run away from anything, or are perma stealth/1 shotting you.
This doesn't even get into mounts which were implemented in a very unfun way, and probably not thought about much at all. Mounts make roaming/small scale, which is already bad, even worse.
My proposal is this:
Balance around small scale/roaming. Use SPvP balance, do not balance around zergs. This way, roaming and small scale PvP is at least enjoyable, while zerg PvP will be just as badly balanced and unfun as it currently is while you are attempting to only balance around zerg PvP. At least this way, some of WvW will be fun instead of 100% of it being unfun. Balancing around zergs has not made zerg pvp any more fun or more balanced, and the cost of doing so has completely destroyed and ruined small scale/roaming pvp.