...or maybe it's a major gripe. Regardless, addressing it will be a major undertaking, so I understand if it's not on the to-do list any time soon.
It bugs me that when I look at a spell like, say, Mage Armour it shows as a Sorcerer/Wizard 1 spell, with no mention of the Witch, Summoner, or Magus.
Now, I recognize that the point of the PRD is to digitize the print information, and that this description matches what the Core Rulebook says, but the advantage of digital resources is that they can be edited when new stuff is released.
Any chance that down the road you might be able to find a goblin (or an intern) to add these kinds of changes in?
Ultimately, it would be great to see the "spell lists" under the class descriptions expanded to include all the spells that are legal and described in the PRD.
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On a completely different, but related topic, if Paizo ever releases a Core Rulebook eBook that takes push notifications from the server to add/revise options as new content is released, I would totally buy that.
It was explained a few times: prd is intended to provide exactly the same information as current printing of books (to the point that prd intentionally repeats all uncorrected errors from printed books). Mage armor is in Core Rulebook which contains no reference to Witch, Summoner or Magus classess so the desciption of that spell does not mention them.
And that's a good example of why I still use the PFSRD over the PRD. I'm immensely appreciative of the fact that the PRD exists, but I prefer the cross referencing of the 3rd party version, even if I do have to carefully check the source of an interesting feat or spell I find...
If you have a suggestion about the PRD, please post it in the main PRD Feedback thread.
Also, as Drejk explained above, the PRD is intended to be a direct reflection of the printed material. This kind of request would involve a developer or similar staff to manage what bits go where. It's unlikely that we'd go in and change the spell entries, but *maybe* more likely to have it sort on the indexes we provide.