well if they remove the cd on gaurdian spirit i see more holy priests wanting it,its looking very good.that means no way u can get ids and if u look at all the new gear it has a crapload of spi on it so in wotlk ids buff becomes too powerful to not take as well
think it will come down to ur guild in the end and wether they feel that taking a ids and the lower healing output that he bring comared to a holy priest is worth it.
and yeah we are shafted compared to other classes if there buffs was a 21 point talent in a tree that isnt viable for endgame pve im sure we ould roll more or less unbuffed ;D
i cant see having ds as a trainable talent will help that much anyway the only reason to get it would be cos it boosts healing/damage and ud still have to go into dis tree to pick up that talent.