Well, there's ups and downs to having novels.
One positive is that you can expand the lore in directions not easily done in-game. Another is that you can sort of further establish your setting by using books as a means of divulging further into the more mundane aspects of the world (think of the post moogle quests, but written as entire books). Lastly, you're able to introduce characters and build them up, or further develop established characters in novels.
One of the big negatives are that lore in novels can lead to being forced to buy everything in order to understand what's going on. Blizzard has been pulling this as of late by having novels act as the foundation for expansions (Stormrage, Wolfsheart, War Crimes, Illidan), which means if you didn't buy the books, you're not getting the whole picture.
SE is also very particular with it comes to who gets involved with their products; I'm convinced that if SE were to release novels for FFXIV, they'd probably would do it in-house to keep the lore in-line with what they want to see (which means we won't get characters with an army of raptors).
Whoa, I hadn't considered this.
As for Med'an, he may not be canon but someone actually paid money for the creation of that atrocity. That entire comic was just a really bad idea.
