from the posts i've been reading, i think people are overestimating the power of strength. it only gives you +damage and lets you carry more stuff. agility gives you damage (less than str), accuracy and evasion. I would rather pump agility than strength. notice in the demo your slashing damage still goes up when you pump agility! unless this is a glitch, agil is way better than str. i'd rather do consistently less damage than be a powerhouse that can't hit anything
The demo may be short, so that way it is harder to see the importance of Strength. Yes, unlike D&D, Strength is not the single over-whelming stat used in combat, but it has its uses.
First off, there are item with high Strength requirements. Not investing in Strength means all your defense has to come from stats/skills and you may not have access to a powerful weapon.
Second off, the ability to carry truckload of weapons, potions, quest items and other miscellanous objects is important for pack rat like me... <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />