for fury, arp comes naturally from gear unless you have an arp proc trinket. then you want to gem until you reach the soft cap, which will give you 100% arp with the trinket procced.
im not familiar with rawr, but the arp conversion ratio has changed yesterday with patch 3.2.2. as arms i lost 8% arp, some people have lost more, some have lost less, and this might be why you are seeing a discrepancy with your arp between the armory/in-game and rawr.
those shoulders are a great upgrade for both fury and arms. i believe for fury the helm, chest, shoulders and legs from the t9 set are going to be bis, with the gloves off anub 25 as your off set piece. for arms i know its helm, chest, gloves, and shoulders with the anub10 legs being the off set piece.
right now you are way over the expertise cap, but when you upgrade your weapons to the new bis (dual-blade butcher/justicebringer) you will probably be right at or a little under cap. so until then you can replace your expertise ring or belt if you have something close to the same quality.
as for your rotation, you dont want to delay bt or ww, so i dont think you will have that many free gcd's to work with. even if you have 1 second remaining cd on bt or ww, hold off slam since both hit harder. to me your heroic strike usage is low, but maybe its just because you dont have alot of crit to get rage refunded through the hs glyph (or just bad rng with it). the t9 2 piece will help and the 4 piece even more with that. just queue up hs once youre over 50 rage. try to get in on some thorim 10 hardmode kills to replace your grim toll with runestone, since you dont need the grim toll hit and the 2.2% crit from runestone is really nice.
you can take one point out of uw and put it in anger management since i think am gives more rage with 4/5 uw than 5/5 uw alone. your 3 points in iron will should be moved to tactical mastery for shattering throw. i really think those 3 points are mandatory for raiding fury warriors since they can stance dance to battle and have exactly the rage they need to shattering throw immediately and stance dance back. improved execute is lackluster for fury, since keeping your normal rotation in execute phase is still higher dps than spamming execute or some variation. you can replace your execute glyph with cleaving to help out more on trash and on fights with more than two mobs (mimiron, kolo, thorim arena, anub in trial, etc).