Both human and undead are able to walk through, so both races have an advatage. Both alliance and horde characters can do this, both factions. So i don't see any exploits here.
You see, vanilla is so great and fun because there a lot of tiny details in this game. A lot of hidden things that take years to explore.
Alliance fence is made of vines, so its absolutely RP that skinny undead and human females can dip through.
If you will start to slowly put away that little details and make the game equal for everyone, then you re walking the exact path Blizzard did, and actualy made it into boring Legion.
Anathema online has decreased to 1400 from 4000 in less than 4 month., Elysium population is falling down (very slowly, i monitor it every day). I would strongly recommend Elysium staff to rethink the way they are changing the game.
P. S. I love the server and i want it to prosper, otherwise i would not post this.