Not a huge fan of how the attributes are set up now. Each attribute giving X% headshot damage to the weapons managed by the attribute is a bit bland.
In my next multiplayer game, I'm gonna be focusing mainly on Perception and Agility, and if I invest points into other attribute trees for their skills I feel that the effects that the attributes give (ie Fortitude or Intellect) would be a bit wasted on me. I prefer to only use weapons and gear that fit my build, so as an Agil/Perc player things like sledgehammers or shotguns I will never use in the game unless I have no other choice.
A small, non-specific bonus relevant to the attributes would be a reasonable thing imo. Such as maybe a tiny movement speed increase (maybe 1% per rank) for Agility, or taking 1% less damage per rank of Fortitude. 1% more block and entity damage per rank for Strength, 1% better ranged weapon damage per rank for Perception, and 1% faster crafting per rank of intellect. The way Alpha 17 handled the attributes in this fashion was good. Way more interesting and impactful than just headshot damage bonuses for specific weapons, especially if you have to spend the points to access important skills not in your build, such as Sexual T-rex.
If I knew what values to change in XML's or if there's any modlets in the future for the above, I'll be all over them.