Ok, Holy, thanks for the insight. I'm not the best at analyzing logs yet, but that log did show me a few things.
Your newly-minted Disc Priest is trying hard. But it's a square peg trying to fit through a round whole. A thorough read through the Disc Priest Guide should point him in the right direction. Essentially, he's continuing to use a variant of the Holy rotation/decision-tree. The Wrath-version at that. This is bad.
Penance & PoH should be his main heals, not GH. For a properly spec'd Disc, Penance is MUCH higher efficiency, procs Grace, and has the added benefit of turning the caster to face the target. PoH should be INSANE. Flash Heal got almost as much healing as Penance. Have him remove that FH hotkey from the keyboard entirely. And how did Spirit of Redemption show up at all? Did he switch specs after getting rez'd?
Regardless, you guys deserve credit. Both for getting the job done and for having the humility to look in the mirror to fix the issues. But please keep in mind, Disc healing is not the same as Holy. Not even close. Might as well be a different class.
BTW, once he gets up to speed, put him on the Tank(s). It should go much better.
"If the Truth can be told, so as to be Understood, it Will be Believed." - Terrence McKenna