whereas Prince Taldaram does not he becomes a copy like Manipulator so when he dies he is still the copy he died as.
Hmmmmm, didn't realize that. Might give him a run in my Wild version of big Priest featuring Resurrect. Still a pretty bad pull for Barnes though. :p
Yep definitely a bad pull haha. But in theory it's interesting if your opponent can't deal with your Resurrected or Eternal Servituded big guys. I'd say it's more high risk more reward in Big Priest wouldn't include it myself for that reason but guess some people like to gamble lol. Having 3-4 Ragnaros the Firelords on board is pretty gross lol.
Edit: for some reason thought it was Immortal Servitude haha.
The only 3 mana card I ran before cutting it for Entomb (better than death for dealing with Sylvanas, Highmane and Tirion etc.) and Prince Taldaram were deaths, which really aren't needed when big priest works as you will always have big enough minions to handle any minion they play (especially with statue deathrattles and Sylvanas). You could also run Shadowreaper Anduin is you are having trouble dealing with big stuff.
Keleseth see's play in zoo decks, Valanar see's play in rogue decks and I have been playing Taldaram in wild with my own big priest deck and is over 70% WR. So no they aren't as bad as you and many others thought.