Scoundrel and Warfare give access to a ton of mobility, it's not about the stats at all. (which in all cases are minimal)
Yes, but it only requires 1 point (if any) to learn and have access to the skills.
I'm talking about once you start placing points just for the passive bonuses.
Sure, each point is a small bonus, but some help significantly more than others, and once you have 6-8 points invested towards the end of the act it makes a marked difference.
I feel as though daggers are supposed to have lower base damages that you increase through other means like scoundrel skills and backstab.
This sounds fine to me, the problem is that the damage doesn't get there (at least without significant caveats) and so a boost somewhere along the lines is in order.