As Thiron points out it's only green if all pets that provide it are beast master. I could have marked BM pets with an asterix or something but thought that was overkill. Water strider IS listed under the crit chance (5%) near the beginning. Even though its crit and not guaranteed the fact that it affects all roles and most abilities ranked crit higher in my list.
Darcubus: i was suspecting that was an oversight on beta -- there's not supposed to be different levels of the same buff IIRC. I'll update the number when they announce it.