With the option to choose between Potion, Flask and Transmute for the mastery I feel its time this Mastery QUestline gets an update. I think instead of making us choose between Potion, Flask and Transmute. Have it where as we complete the Alchemy Mastery questline it affects Potion, flask and Transmute evenly.
This way alchemist can get the perks of Potion Master, Flask Master and Transmute Master on just one toon. Since MOP was the last expansion they did the questline for. I feel it wouldnt affect gameplay to much IF at all since I feel not to many people will be to worried crafting the Potions and Flasks from Classic to MOP.
The only time i see anyone crafting older pots and flasks is for LVLing alts.