I don't play with healing capable classes, and think I'll never do.

But I do play with a barbarian that really needs healing to work fully, so I know the value of the healing capable builds.

Therefore, I learned to respect the healer's mana, the source of my life.

Philosophically speaking, any person that plays with a healing capable character is acting in a altruist way, as he could be just killing everything, without worrying about others.
You can say that it's their role, as we must have some kind of healing to success. But I think that they deserve more credit.

All that said, I ask for reasons on the diminished efficiency on the two main healing spells, and probably to radiant servent's aura.

Ninja insertion:
And if you come to answer, take the time to explain the change on freedom of movement also, please. Given the active combat of ddo, this change can be very harsh.