It does not show up on the persona window - that is typically where your dirge/swashy/coercer buffs and jewelry will show up. Improved moderations seems to be working great for me - I have a new aoe/dps spec I am using as mentioned on the other thread and am pulling several unlinked encounters, throwing up stone sphere and grabbing everything onto me + reinfocement and blue aoes. I am almost as comfortable with wild mass pulls now on my guard as I am on my pally and SK - not quite but very close.
One thing I cannot figure out for sure though is if moderate will stack with improved moderate as both seem to be castable at th same time - in pvp I will put moderate on the healer due to the way it works in pvp on top of improved grp moderate. Cannot tell for sure if it stacks or not though.
I have noticed that improved unyielding will seems hit or miss. not sure if it might be a pvp bug or if I am taking some massive damage right after it goes off - often when I expect it to go off I just die even when it is up. With the new borked resist mechanism on pvp servers I am taking massive damage from toons who have no buisiness damaging me as I see no pvp gear buffs up in their windows and they are green con - where as before these toons would barely scratch me and only = geared players could harm my guard. Every grp taunt is massive pain incoming now even when buffed to 80% resists.