We'll be going through the traits system shortly and you can expect changes. The assignment [of] boni so far was rather arbitrary and served more as a test of the dev pipeline. Your points are very valid btw & reflect the original vision more than the system as is.
Re: Backstab - I do know that Backstab with larger weapons via the Assassin Talent was possible in earlier versions, so it should still be working unless a patch broke it. I've found that the proper positioning of Backstab can be a bit finicky - it's not always clear where you have to stand to be considered in position for a backstab.
Re: Intelligence points granting more Abilty points:
