Well, a point against it. As a fighter exclusive mechanic it feels good, granting the fighter a mechanical niche. On the rogue it feels interesting, but at the same time it has watered him down. Being forced to follow the fighter rules, has given us a very weakened sneak attack (one that doesn't even feel familiar due to using different sized die).
Don't get me wrong, it seems fine when used for non-combat stuff, but we could have managed a similar effect with a different mechanic, one based on d6s that couldn't be used on combat except for sneak attack or backstab. However now rogues have become "like a weak fighter just with 4 more skills".
Also worrying that when rangers and paladins show up they will end up inheriting the mechanic too, causing fighters to become a weak class again.