Q1: To be honest, 6 seems already a bit high for a system that wants to avoid dump stats. The only thing I hope is that attributes don't feel just tacked on, and most aspects of gameplay could be handled by derived stats or skills. Q2: Having hard-to-hit tanks with poor accuracy does not seem very appealing to me. If anything, I prefer systems where accuracy is mostly irrelevant, and damage mitigation is done via damage absorption. I never liked the concept of damage avoidance tanks, even if it offers more build options. Q3: No idea. Q4: Attributes should give a reasonable bonus and that's it, like in D&D 3E. I don't like attributes being the major governing force behind any single value. Q5: Same answer to Q4. Q6: No idea.
I must admit I am a baffled by this. Am I the only one remembering that DA:O had 6 stats? Sure, each class had a few dump stats (and sometimes, all except one depending on the build), but this is true for most systems.