Probably because it looks like shit. I can up some screens to prove it. The UW mode does work in Arx Liberatis.

Hmmm, on XP i could use cheats just fine. But still, after many tries. Drawing them correctly is very hard. In windows 7, here, i managed to be unable to cast even a single one of them. For some reason, i couldn't. Have tried all of them, except for only one. The 20x Caom rune. And this one is not on any video display. I simply couldn't draw twenty times this rune, was very hard. Plus, even guide lacked a description...