In general, I agree, but in this particular instance, I don't think you're completely right. The trouble with the WC4 novel is that the change of fighters goes in both directions. It's not just that Scimitars and other old fighters have shown up in the novel without being in the game - that could certainly be explained by game mechanics and the need to keep the amount of content down. The problem, however, is that the Border Worlds fighters that appear in the game are completely absent from the novel. And that's the real pity. After all, there was nothing to stop the authors from explaining that the Banshees, Vindicators and Avengers were also really old - or, that they were new, but the Border Worlds had very few of them. Any explanation would have been fine - but instead we ended up with completely silence, and two completely different sets of fighters.