I concur. This is information that should be both available on the Lodestone site AND in-game by talking to an NPC.

Example:

Iofa (Naldiq & Vymelli's): Not all Bloodless have the same weaknesses. Being constructs, Forgekin have the most variety of all the Bloodless. Some Forgekin can be stunned by a bolt of lighting, while others will be energized and attack faster.

Implementing something like this should be relatively easy for the Development Team, methinks.