With the recent upgrades Disembowel is a very good skill, everyone seems to use it.

Pincer have several advantages over cranial, most notable is the fact while raiding and not hitting the target you can still do quite alot of damage with pincer.

Whirl is not that good, but it has its uses and as the other skills are very nice(damn you weaponbreaker for destroying armageddon).

So now axes are quite a good and popular spec also..