I must respectfully reject the idea that all video game tie-in fiction must be terrible... although I do admit that most
officially published tie-in fiction is terrible. Horrifyingly, I've actually read a great deal of well-written fan-fiction (most notably
Tiberium Wars, whose writer takes ques from both RL military memoirs and Warhammer 40k). This has convinced me that while the fiction itself is not necessarily at fault, game companies have a strange ability to pick up the uniquely unqualified writers to do much of their work.
So, with that said and done:
TEA - No. Just no. The Empyrean Age is a book that should not have been written (and definitely not read). You can learn all the most important (and painful) points from the community; there is no need to subject yourself to the actual book.
The Burning Life - As people have said, it's more a giant infodump than a true novel. It's... okay, I guess? It's no genius, but you do learn a lot about the universe and aren't left with the urge to repeatedly impact the nearest wall with your head.
Templar One - It's... well, I won't say it's as bad as TEA. That isn't to say it doesn't have its wallbanger moments, but they come at a less dramatically staccato rate. Those that do come are pretty bad, though - without :spoilers:, I'll say that one which really bugged me was a returning character from TEA being selected for something he shouldn't have been, while millions (if not billions) of other more suitable candidates were out there. This has entirely predictable results.