it's not unusual. I've played priest as 'main' since open beta and have progressively removed all the cards that seem very strong at first but are actually holding you back.
- Divine Spirit / Inner Fire : very unreliable, you'll lose more than you win, because they will sit in your hand without opportunity to play them against better players. At best you get one attack of and you get silenced/removed and you lose. Just doesn't work past the lower ranks.
Divine spirit is kinda useless, people who like to play it kinda forget that they just used 3 cards(minion+divine spirit+inner fire) for something that requires just an owl to be negated
Inner fire has got its uses, at least you can play it against annoying enemy minions with 4 attack.
example: enemy plays ysera (4/12), on my turn I play Inner fire+Shadow word death (of course you could just silence ysera, but sometimes you got to play with what you got in your hand, and what I'm trying to say is that at least Inner Fire has got more versality that Divine Spirit)
- Lightspawn: too vulnerable, has to be the minion that dies the fastest to just about anything.
- Mind Games: cost too high for what it does, since you do not get the battlecry you need to pull at least a good 5 cost minion to be on par with a Yeti (a 4 drop which you could've used instead of Mind Games). Used it extensively, found that in the majority of the cases Yeti would've been way better.
I know, but sometimes, when you manage to get a cairne, or an ironbark at turn 4... It's a gimmicky card that's fun to have. I will probably swap it with 2 azure drakes or 2 acolites of pain whenever I get bored of it.
- SW Pain : look good but you end up using it on random targets anyway, and brings no board presence at all! You trade a card for a card and the initiative stays with your opponent. Replaced them with low cost minions and became much more effective. Also the 4 attack blind spot can be a pain if they buff their minions, better have a minion on the board yourself.
SW Death however is good imo, you need at least one in your deck. Mind Control is also good but never more than 1 , too high a risk to be a dead card if you draw it early.
I don't really like Mind control, it's just a dead card most of the times, It seems more efficient to me to just use faceless manipulator for half the mana, the opponent will still have his card, true, but at least you kinda evened the field per one round, plus you can just copy your own ragnaros or ysera for laughs.