GM were uninspired and had their own problems, so also couldn't allocate too much to SAAB.
The example with Audi is well choosen. Audi had to come from further I think, as it was perceived near premium to some extend, but also lacking very much face. Billions and billions are invested over decades to bring were it is now. Read Piech saying a couple years ago he wouldn't do it again. Would have been easier to start a new brand.
I tend to rate the 9-5 higher that the ng900/1st 9-3. At least in the 9-5 the SAAB typical values of safety and solidity were better represented, while the ng900/1st 9-3 simply lacked substantially. Among the things the 9-5 lacked were being versatile and character/unique design solutions.