Trashos in addition to detection bonuses and the required 10 AGI for Blitz, is there a more nuanced set of reasons you recommended 8 AGI for my sneaky SMG/thrower glass cannon build? I appreciate than a tin can SMG wielder is different than a sneaky leather armor one, just curious if I'm missing something here.
(Let me just remind everyone that I still know nothing about the expansion)
You are going the sneaky route, why are you interested in being a tin can? Don't try to be everything at once, your build won't end up being very good. Is it the "Full Auto" feat that you want? Leave that for Assault Rifle users, it is not worth the investment for SMG builds. Generally, if you are more interested in being a tin can than being sneaky, then Assault Rifles are more appropriate than SMGs.
As for AG:
- It buffs your Stealth. Very important for SMGs, as you will often want to get close before you start combat.
- SMG is a fundamentally a mobility build. Get in, get close, cause havoc, get out. AG increases your Movement Points. Increased mobility also allows you to get to the right angle of attack every time, so that you hit multiple enemies with your burst.
- It allows you get Blitz (at 10), Sprint (6), and also Uncanny Dodge (8), Interloper(7) and Hit&Run(7) if you choose so.
All in all, AG is very important for SMGs. If you need more Ability points for DEX, I 'd cut them from CON (the additional points that come later). Now, I wouldn't be surprised if there are other ways to go about it too, but I would be surprised if they play better.
What are the essential ones?
Before the expansion at least, Spec Ops and Commando. Also crucial are Sprint, Quick Tinkering and Expertise (although you need to check if Expertise is helpful nowadays- it used to be very OP for SMGs and I wouldn't be surprised if it has gotten nerfed).