Written with the knowledge Blizz makes additional, sometimes unpublished, changes to the patch...
I think Paladins will come away as stronger healers for MT assignments due to Sacred Shield adding a Heal Over Time component - for 100% of the Flash of Light cast! In addition, the 3.2 patch changes will make Beacon of Light a more effective spell since the effects are based on the total heal, not the effective heal.
And while I've heard many complaints on the mana return on Illumination being halved from 60% to 30%, the effects of this will be minimized because items with MP5 mana regeneration will be buffed by 25%.
Now regarding your concerns on overhealing, you are going to see Pally healers overhealing even more. However, I don't foresee this affecting a paladin's performance or role within a raid.
[Insert witty signature here]
Bookmarks