Quote Originally Posted by 'Bigfish',index.php?page=Thread&postID=149551#post 149551
I think the intention is that Prot Pallies can use either Warrior tanking gear, or Holy Paladin Spell+ gear. Otherwise, you have an entire class of plate gear that is only good for one spec of one class. Personally, I'd just be annoyed by the wasted +spirit on the stuff myself, but its not like you can't throw on +spell power to your tankadin and still get use out of it.
I don't think they intended prot pallies to use any +sp / holy gear from looking at the wotlk itemization and class changes. You need both AP and SP for the prot spell ineup. You also need defense and block rating. Str gets you AP and block rating, stam gets you SP. There are very few (pre-naxx at least) items with +block, and none of them have int / sp. There are lots of +defense items, and all of them are stam / strength.

So if you choose to wear any int / sp item your losing out on defense, block rating, and AP and all you get in return is extra TPS for only some of your abilities. If it were just 1 or 2 temporary items it would be OK, but you would not be able to gear for heroics or raiding with any int / sp gear.