dtgreene: And some things (that the people at Beamdog classified as "bugs") were changed. (Example: Armor of Faith, I believe, was made to not stack, making the spell no longer useful at reasonable levels.)
archy2: It's a first-level spell, it's not
supposed to be earth-shattering at high levels.
I also think you're much too hung up on that one tiny detail. I get it, as a long-time fan of a game one can get used to certain bugs and get into the habit of exploiting them. But that's not a reason for an enhanced port to not fix them. New players (and more flexible old players) will enjoy it more without the bugs.
The thing is, the spell in question is rather useless at low levels without stacking; it *needs* to stack to be useful at all at such levels. Also, note that this spell's duration is short.
On the other hand, I don't mind the change to Emotion: Courage, mainly for two reasons:
1. The spell has a much longer duration, which makes it much easier to stack. (+5 hit and +15 damage per hit is attainable without much effort.) You can cast this spell a few times well before combat, whereas Armor of Faith needs to be cast when combat is imminent or already started. (In the latter case, you might not get it to stack to the point where it makes you invincible.)
2. Emotion: Courage still restores HP if cast again before it wears off.
On the other hand, Vampiric Touch not stacking at all does bother me, as it prevents you from using it to heal before it wears off. (It also makes you immune to enemies using that spell against you, which doesn't make much sense.)
One example where fixing an exploit inhibits normal use of the spell is Project Image. (I know that spell didn't exist in the original IWD, but bear with me.) In IWD: EE (and probably BG2: EE), if your image gets killed, you can't summon another until the duration wears off or the caster is hit with a dispel. It was probably intended to prevent the use of Chain Contingency to get multiple images, but it ends up hurting normal use of the spell, where killing off (or dispelling) the image so you can summon another one is part of the strategy.