Ah... A thread about WCIV novel. Reuniting with and old friend... The thrill of Battle...
Not really.
According to common lore, Forstchen wasn't even the main author, the co-author did most of the writing.
** WARNING - OPINION **
I was also disappointed with the WCIV novelization. I liked the game/movie a lot, and I didn’t like the novel.
Anyway, here comes my personal bit of interpretation. Please notice that I am not debating what is "official" or not, just how I see it.
Tolwyn is in a lot of ways a tragic hero. There's his innocence, in the beginning. But he ends up quite a twisted person, in some ways because of the war around him and events that lead him up to what he became. On different circumstances, he probably would not do such evil actions like he did on WCIV. It’s a fantastic character when you think about it.
After reading Forstchen work on WC novels, I have the impression that he liked Tolwyn, and what Tolwyn stands for. Also that Forstchen didn't like Blair, or what Blair stands for. So it might have been difficult for him to write the WCIV novel, since the game/movie WCIV is about Blair being right and Tolwyn being wrong, and of Blair defeating Tolwyn in the end... It is a novel where the author is fighting with the story. He wants to story to go on a given way, but it must go the opposite way because he doesn't control the main events. So it ended up strange and twisted. That is MY point of view.
I know that LOAF and Chris disagree with a lot of this (as does LOAF's "merry guild of followers", to use a agwc reference). I do respect that. In fact, I'm very aware of their opinions, as they are aware of mine. Some “outsiders” didn’t agree with them either, and we have debated this endlessly on agwc. More often then not, it had a few knife-fights. There's no point in repeating that here.

I am re-stating my opinion because you was not present at that time.
That’s the impression that I had by the way the novels were written. I could perceive that the author did in fact like Tolwyn and Bear a lot, just as he didn't like Blair at all. Of course this is very subjective, and a lot of people might think differently. That’s how reading novels are. Not everyone gets the same impressions.
As for specifics, yes the novel tell the story on a very different way and there's a lot of events that don't quite add up. It makes it really hard to put it all together on a single, unified universe without contradictions. But it’s not my job to debate the specifics of this. You either think game/novel can have contradictions that can't be resolved, or you think it's all good and contradictions cannot exist. But regardless of your choice, there's no point in debating it. If you really want to go into it, search some old newsgroup records from alt.games.wing-commander, if you can find them.