Yea but, u will do 1 less GCD (Death Coil) in the end, cos u had to repeat that SS.
DK A) will do more Death Coils aslong as he has Runic Power for it.
DK B) will do less Death Coils and will have to sacrifice Blood Strikes so he doesnt get over capped with Runic Power.
Example: If u have 130 Runic Power and are about to do:
BS > SS > BS,
Its better to use Death Coil instead of BS so u dont waste 35-40 runic power, mainly cos Death Coil deals more DMG and cant be dodged. (If u get what i mean...)
If u can fill all of ur 12 GCDs u have during rotation cycle with damaging abilities 90% of the time, its better to cap Expertise from my pov.
However, if u find urself having a lot of downtime, aka 1-2 sec not beeing able to cast a single ability, or doin Horn of Winter whenever its off CD, it is better NOT to cap Expertise.
Cos u can fill that downtime with repeating a spell that got dodged and end up having more DPS in the end cos u gained Haste and Arp for the cost of Expertise.
Posting from phone so it might be hard to read/understand. Sorre. :(
As for expertise cap:
Maybe they intentionaly made expertise cap 29 when u are not attacking from behind, aka, tryed to somehow make up for parry missing out completely... who knows...
Edit, 29th May:
About expertise cap...
Was still getting Dodged on Bosses:
Deathbringer (was attacking him from behind)
Festergut and Blood Queen (was attacking those two from sides)
Rotface (at the moment he turned to slime spray, so basicly while i was hitting his face)
On Lich King however, where i attacked him and raging spirits from every angle (back, sides, front) not a single dodge happened.
I dont know whats the deal with that, but it was anoying as hell.
As for the Rune Grace period after a Dodge happens, it gets delayed a bit sometimes, which is another downside when it comes to itemisation without expertise cap.
Also, at those moment dodges occured, i was runic power capped cos i had to repeat that spell, aka cast 1 less Death Coil.
Overall, at the curent state of warmane, it wont matter if u cap it or not.
Try to find what suits u the most and play the best u can.
Guide will be finished next weekend, and il slowly start working on the Tanking Guide, finishing every single one of them once and for all.
Might also add, BiS lists and talents i use on my other classes with maybe rotation sections, but most sertainly wont make any other guide, ever.
Best of Luck.