The old Alchemist stone is crap ? Are you out of your head ?

Even without the +100 healing on this trinket it would still be one of the best trinkets for healers in the game, i think you would only replace it with the trinket from BT.

Its no good for trash or short bosses, but when you start doing long boss fights it is superb. At max you can get +50mp5 from this trinket and the old one.