Well, one of the problems the film faced was that Chris Roberts' vision was just plain wrong, and dearly needed to be compromised - and it's actually rather nice to see him own up to that here. He mentions in particular departing too far from the look and feel of the series, and how this was to some extent thought necessary because of Episode I, but it was his decision in any case. The time dilation thing, which mercifully completely vanished from the shooting script (well, almost completely) was also his idea, and boy, was that a bad one. I rather wish there was a bit more conversation about that here (why did he think it was a good idea? Why did he decide against it in the end?), but then again, what's the point of talking about a bad idea that actually did get cut at the right time?
One other Chris Roberts comment stands out to me, as really, really good self-reflectiveness, both in terms of lessons he personally learned, and in terms of the broader differences between games and film. He talks about being used to the script being mostly dialogue, because in games, the action is almost completely limited to the gameplay sequences - and how this threw him off in terms of understanding what makes a good film script, and also how this meant that his experience with directing WC3/4 left him unprepared to film action sequences. That is very good stuff, very insightful... though I'm not sure if this is necessarily an area I'd point to in the film, as being problematic. It's been a while since I've watched the film, so I'm not sure, but I don't *think* it was that heavy on the dialogues side, was it?
By the way: do we know anything at all about that earlier, 1993, Wing Commander film script that's mentioned at the start of the chapter? What was that all about? I'm certainly not surprised that project didn't go anywhere at that time, but does that script exist somewhere?