Hi. I played an wolfpack zerker recently and I just thought I should give my feedback.
I like the new rearrangement of the skills, I too didn't like the way Runic made the 7th skills not attainable until Act 3, however in the case of some skills - like wolfpack - the new skill levels are not good too. Wolfpack is essentially shit on rank 1, and pretty much underpowered until Tier 1. In my opinion one of the things Runic did right was making the Tier 1 of all skills accessible within 6-7 levels of it's rank 1. I like the idea of having wolfpack at skill 16, but with the current arrangement I won't be using it until 42 anyway, because until Tier 1 2H autoattacks with Shadowbind are more powerful then wolfpack.
So in my opinion either rank 5 should be made more easily accessible for all skills, or some changes should be made in the case of wolfpack because as it is, it's basically still a lvl 42 skill.