The increased duration on Storm's Eye allows you to comfortably fit 2 more GCDs in your rotation. As a MT, your best bet is to alternate SE and BB combos while fitting in Fracture and Inner Beast as soon as you hit 5 stacks. This is a fairly nice buff to WAR MT DPS.

If you're in a situation where you need to hold onto Inner Beast in anticipation of a big hit, then you likely want the SP debuff also. This is the situation where you'll want to alternate all three combos.

Also, an OT can now do SE > BB > Fracture easily for maximum damage instead of SE > Fracture > SE > BB.