So fury warrior discord has no answers. A certain "theorycrafter" on there is banning people actually looking at the answers. So here's what were are looking at.
Unlike other "theorycrafters" this is public knowledge so I recommend recreating sims using the default fury sim profile. Using a set template base allows people to sim variations from the template to show what are "improvements" or superior dps barring one off scenarios which can not be recreated.
simulationcraft.org/reports/T21_Raid.html
BloodBath Old dps was 2,504k 4pc t21 w/cof
Dropping 4pc set is a 100k dps drop essentially 4% dps drop (this was simmed by swapping 960 tier 21 chest with 960 soul-tempered chest, both haste/mastery)
Swapping cof while keeping 4pc 21 with say a 935 trinket results in roughly a 80k dps loss. (tested using eye of command 935)
Swapping cof while keeping 4pc 21 with say a 960 trinket results in roughly a 50k dps loss. (tested using eye of command 960)
What does it all boil down to?
Depending on the size of the 4pc reduction with cof we can expect a 1-4% dps loss using BB spec. The APL for BB will also change. Right now sim's prioritize holding BB for BC while we will be switching to a 2xBB per BC rotation while not using cof. Which will increase damage for non cof builds
Inner Rage Old dps was 2,374k 4pc t21 w/cof
Swapping cof while keeping 4pc 21 with say a 935 trinket results in roughly a 100k dps loss. (tested using eye of command 935)
TLDR: Assuming t21 4pc is reduced by 50% for COF other trinkets will sim higher at ilvl 960 any less and COF is still BIS by a large margin