Even Mirror's Edge resorted to guns from time to time. and it did have a bad plot, and too short.
Single player games like these should at least be the length of Half-Life
Isolation could also benefit from more open maps instead of some string of setpieces.
Even if the alien a.i. is great, it might end up being like Tomb Raider, which has little to no incentive to replay and the tacked on collection gimmicks have no rewarding incentive.
Isolation's design can't be like some movie rental. There will be scripted stuff and a path, but they could make it more open world within the station. Yea it's tough keeping a story progressive while having a totally open enviornment.
but still, it could be much more than a tunnel of hide and seek.