Originally Posted by
Mindark
Big wall of opinion coming up, I am not passing these statements as fact.
In Vanilla, most "specs" didn't specialize in anything. Classes were mostly pigeon-holed to specific roles/"specs," and the talent trees gave those roles a little bit of flavor. These choices didn't really exist in other games (as far as I recall). Everquest was the biggest competitor at the time, and when I played, didn't have these different paths to go down. Looking back, I can see that WoW was pretty much designed the same. If you rolled a priest, you were a healer. If you rolled a paladin, you were a tanky healer. These talent trees added flavor at best (warriors excluded) to whatever role Blizzard determined your class was destined to fulfill. I think priests are unique in this aspect because they're the only class with two healing trees, and we're trying to make sense of it. Discipline priests didn't exist in Warcraft until WoW. And neither did Shadow. To argue of their fantasy and identity when nothing canonical existed is subjective at best.
To me, the two can largely be summed up as:
Holy - healing throughput
Disc - support
The further you go down one tree, the more of said "identity" (mine assigned above, not your feeling of their identity) the priest takes. Perhaps one could say that these (throughput vs support) are specializations, albeit very lame ones. Aside from that, they are identical in play and design. Being identical in play and design would imply that one (holy) cannot be "correct" (this is my interpretation, I am not saying this is a direct quote from you) or "has identity" while the other (disc) is "wrong" (this is my interpretation, I am not saying this is a direct quote from you) or "has no identity" when there is nothing canonical to back it up. It merely makes it a subjective opinion.