Appreciate the replies. Looking at Carrying Capacity, 20 STR w/Exceptional Strength is 430, and with 22 STR still 430. Still looked nice though the 22, but if it's not doing anything it's not doing anything (and seems to actually be hurting as with the 2 vs 6 dmg bonus.)
As an aside, the debate over duel-wielding with or without Ambidextrous, or big halberd sorta weapon is kinda silly. Figuring in the STR damage bonus and 2 instead of 1 Assassinate hits, the damage with 2 weapons is obviously a lot more than 1 bigger weapon. For those who need forumlae:
Pair of Wave Blades is 2x[1-10+6]plus 2xAssassinates
vs
Halberd 1x[1-18+6]plus 1xAssassinate
or
14-32+18 (assuming the 2 Assassinate hits are the avg dmg)
vs
7-24+9
Example assumes 'Stone' Weapons and 20 STR.
As to whether Ambi and other Traits are worthwhile, levels come quickly and easily, no reason not to unless wishing a harder game by skipping them and/or taking Disadvantages. But honestly, the highest level areas are hard enough (golems et al.) If ya see a Shielding Crystal, buy it!