For up and coming Alchemists, the Philosopher's Stone has been altered. Like the Alchemist's Stones after it, it is now a trinket. Also like the Alchemist's Stone, it'll do a little something for everyone. Emphasis on little. The new Philosopher's Stone will add 5 to each of the basic stats.
In addition to the little boost to Alchemy above, the materials for the new Alchemist's Stones have been toned down somewhat. Rather than 16 primals per stone, you'll need only six. That's anywhere from a 100 to a 300 gold reduction in price depending on the primal and your server's market, or a few hours of farming saved, so I really can't complain.