amccour: Okay, screwed around with U7 in PCEM and now that I remember how the lighting system's *supposed* to work it might be hard going back :P
I wonder if it'd be possible to kinda backport SIFixes to the original SI.
Wolfram_von_Thal: Yeah, I also tried the game in PCem, unfortunately it's exactly as sluggish as under DOSBox for me... but I know what you mean: If you realize all the ingenious details the game has it's really hard to go back. On the other hand: You won't notice all the details later on. It's also fair to mention that Exult brings new quirky details into the game - like Iolo's lactose intolerance or the possibility to craft additional things like butter out of milk.
The thing with the lighting isn't just a matter of, well, it being a nice detail -- it's flickery and inconsistent in a way that, at best, looks very strange and at worst either makes the game darker than it should in a way that kind of effects playability or sometimes I've noticed that night just doesn't happen.
Regarding speed, I ended up going back to DOSBox because it's easier to fine-tune the cycles there and it seems like your own party members are a big contributor to things getting slow, so being able to up the cycles by ~500 every time you add someone seems to offset that a lot.
I do wonder if they game had speed issues on actual PCs of the time. Reading up on someone who built a 486 based PC specifically for U7, I kinda get the impression it did :S
Though, what's weird is that I've noticed that regular U7 in DOSBox is mostly slow in large buildings, like Lord British's castle, whereas Exult has a lot of slowdown in combat that I'm not running into at all in regular U7.