Default Shutter Speed on AOSP ROMs

I Just switched to a G2 from an Xperia Z and I have to say the shutter speed is rather slow. I Was sitting in a moving train trying to take a picture of a document however the shots turned out blurry due to the shake. Its honestly quite disappointing as this was supposed to be one of the better smartphone cameras and it even has ois to help with handshake. I'm running the latest Paranoid Android for D802 with the camera app from the OnePlus One as it has the best shutter response so far. Is there any ways to improve shutter speed of the camera on an AOSP ROM?

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Nokia Lumia 710 > HTC Butterfly > Sony Xperia Z >LG G2