Overly complex? It's just find the materials (which you find everywhere or you can buy) and then press E to create your potion. After that, you have nothing left to do.
It's over simplified, and it's bad.
overly complex as in, it's pretty random when and where you'll find the ingredients. i've played through the entire game and HOTS, i'm now level 38, and there's still quite a few potions which i -still- don't have ingredients for, after pretty much picking up random stuff all across the map.
the crafting system is a bit better in this (although not completely, but that's a topic for a different thread).
and then you only get the benefits for a relatively short period of time...and they're super specialized, and gives relatively little benefit.
i'd like to see the alchemy system revamped so that there's -predictable- places where you can find materials, and make the potions/oils give fairly strong -general- bonuses, much like Thunderbolt, etc.
right now the Alchemy system is weak compared to the other attributes.