Guild Wars 2

There was a point where tequatl was only able to take crit damage on its head. I heard this was changed not sure of the reason why but this was actually an amazing thing from a design point.
It meant that “tanky” builds could go up close and get crit damage whereas less tanky builds now had a choice. Risk going close at the chance of dying easily or stay far but lose crit damage.
I do hope there are more bosses like this in the future that promote build diversity like this, since it doesnt force a build but doesnt rule out a build either

Originally teq couldn’t be critted. Then they recently changed conditions to be able to stack really high. However, this killed teq too quickly. So to balance him, they doubled his health and re-balanced it by making him crittable.

However, due to a bug, only one spot (near his head, but not actually his head) was crittable. This was subsequently fixed since it was unintentional and didn’t really work as a mechanic.

That is why it was changed.

In theory it could have worked, but the new condition changes was obviously causing balance issues, so having only 1 crit spot was quickly changed to how it was intended to be. Also, because the crit spot wasn’t targetable, it wasn’t a viable mechanic either.