First off, who is gemming str?
Secondly, ICC normal modes probably aren't going to matter THAT much how you gear, but based off of gunship and saurfang, if heroic modes are hard at all, tanks will want to have 2 sets of gear: 1 for EHP, 1 for avoidance. Saurfang is a fascinating fight in that dodging 1 extra time over the course of a fight could literally be the difference between a kill and a wipe.
I am really really confused at what you are getting at for the most part. the DRs on dodge currently are still lower for me if I were to gem for it. I probably will have a set of gear that is avoidance, and if parry is a lower DR at a point then yes, I will gem parry. But not every fight is going to be avoidance, a lot of fights will be EHP fights again.
Edit: oh and... what warriors are gemming raw dodge for survival fights right now?