Honestly, I thought about it, and even in my optimal scenario given (SC > Infuriate > Overpower > IB > Overpower > etc.) it isn't worth it most of the time. If you are prepared for pickup, and not behind the curb for some reason (drop earlier then expected in T4 coil as example) you'll be better off saving Infuriate for 20% DR back to back. So pickup would just be a Flash > Overpower > IB > Infuriate > Overpower x2 > IB > Overpower > etc. I'm not trying to be argue with you, just thinking out loud. Again, if you are doing progressive raiding, these things do matter and add up.
Again, I'm thinking toward *meaningful* content, where we aren't 3 tiers overgeared and blowing SC for funzies and damage numbers.
*EDIT*
As far as your burst scenario, there isn't a huge amount of predictable burst on a vast majority of *AoE* scenarios. It is the whole point of AoE and picking up multiple low hitting mobs. The challenge comes in the collective damage, and burst mechanics aren't seen much, if at all, because of this. I can't think of anywhere that 20% DR is going to be "less impactful" then a bit of free threat, that won't likely be needed with Overpower threat buff either. Warriors don't generally suffer from these threat issues right now, even with +1 Relics going crazy. Some threat gen is definitely less of an impact then 20% DR, especially when you have to choose between the two for ~20 seconds (unless Infuriate as noted).
While I won't discredit using Bloodbath to help out healers in AoE scenario, it won't come anywhere near 20% DR. Also my suggested change wouldn't impact this. Even without threat modifiers my change to SC would give more reason to use these CDs together, and further help healing for AoE scenario. I mean no offense when I say this, but the fact you are talking about Stone Vigil and single target stuns on AoE pack pulls (as well as bloodbath being meaningful) leads me to believe we are talking different worlds of tanking.. This is what got WAR in trouble from the start.