First off, your profile links to a mage, and we have no idea who you are in your parse.
Secondly your whole post just comes off as a whine "My guild thinks I suck." I'm not sure how you expect us to convince your guild that Disc priests are good healers. If it's not self evident to them that shields don't show up on most healing meters, then nothing is going to help you.
So I have come back to WoW after more than a year off. I have read up on lastest changes, rotations, speccs etc.
I have geared up, joined top rading guild for my Realm.
All of a sudden I am the "worst healer ever" ?? I easily heal through heroics. ToC seems easy also. However my guild feels that I am a poor performing healer. I need advice/help. I know, and have told them time and time again Disc Priests are not ever going to top meters. However they still think I am below par on healing, and I am getting benched in ICC25. Any help/Wisdom/Criticism/Rotations for ICC would be much appreciated.
Also as Disc Tank heals on Marrowgar, I find I am moving so much I cant get enough heals off to keep tanks good.