It meant that an exception implied a rule for the other cases. Such as "no parking 9-5." The exception is that it's only 9-5, implying you can park at other times.
One less permanent penalty for failure, but not total failure, is to introduce a homebrew disease track condition. Let it be something you can justify as skin/lung burns.
There's no need to retrain the feat. I was correct, but I forgot a caveat. You still have to swap out an equal level power. Each time you level up, you can swap out instead a higher level power for a different higher level mc power without any need for feat retraining.
No, you can't replace powers that aren't your class powers. Assuming that you're talking about the levels at which you start trading lower for higher.
Are you also asking if you can trade it for another power of the same level from your class? Yes. From your multiclass, no. Again assuming that...
It being an interrupt means that it occurs before the attack is concluded and can therefore nullify the attack. It saying "hit you with a ranged attack" is saying that it's triggered when the attack roll is revealed to be be better than your defense.
No. As far as I'm concerned there's a corrolary to the legitimate targets rule, valid threats. If the attacker isn't trying to legitimately do you harm, or is not capable of doing so reasonably, then effects due to damage from them do not occur.
My explanation is more along the lines of:
Healing Word is an Encounter (Special) power, with Special being that it can be used twice per encounter.
Initiate of Faith grants it as a Daily power, not a Daily (Special).
Well, it just seems odd. You ask us already knowing the answer, but end up disregarding it anyway.
As someone who answered your question, I feel used and tossed aside. :(