Hey there - would love to see this class added as well. The URL pasted by @Seagaard is our bible and absolutely has everything you need to know about Arms.
Your KPI is correct, our resource is rage (and being rage starved will significantly impact the KPI), cooldowns are numerous but the main one we're interested in is Battle Cry as it significantly boosts our ability to cast Focused Rage to fish for Tactician procs which, in turn, enables us to Mortal Strike (our main DPS source). Note: Mortal Strikes should be used in conjunction with the debuff Shattered Defenses on the primary target.
This "Focused Rage" build is among the hardest to play in the game currently but when mastered, the burst DPS is incredible. For this reason, we would love to see CheckMyWow add the class as it will help Arms warriors improve their play.
Thanks for your consideration.