I was only talking about Savage's enmity bonus, which I specifically mentioned in my post. Comparing DASE raw (for convenience, mostly), it's 800 (150+250+400) potency to RA's 690 (150+200+340) (+100 for Savage bonus, effectively "790" potency). RA doesn't require any resource management (other than TP), so it, naturally, doesn't come with any other neat effects. Also, I am not really sure what planet I wrote that original potency number on, because I've made this argument before and used the right numbers, so... orz
Anyway, the added potency from Savage's enmity bonus is enough to keep your threat lead alive against DPS, but not necessarily other tanks; I don't think it's fair to compare DRK/PLD on a threat basis because PLD's MT threat is sufficient for handling DPS, but it's easily the weakest at keeping the other two tanks at bay in direct tank stance on tank stance pissing matches. I guess that's an indication that PLD's threat needs some attention, but I'm not sure what you'd do other than bumping the ShO multiplier to compensate.
I haven't really taken stance dropping into account, because I don't run content with competent enough healers to drop tank stance outside boss pulls. I'd feel very, very sorry for the healer who had to try to heal me through a big trash pull because I wanted to squeeze out another 50 dps from dropping Grit.
PLD only had that option for 2.55, and it was rough for WARs who wanted to MT. OT slot needs a high potency non enmity rotation to avoid the old "FOF ROH ROH ROH ROH we;lp RIP real MT, I'm the tank now" situation.