the 2x lens i think, isn't as good as the wide angle. the images are flat without depth. this is a hardware issue and i'm not sure how far sofrware can fix this problem. i have Zeiss lenses on my proper camera, and the 2x lens is not Zeiss standard.
I have not actually covered up a lens in the bokeh mode to try that out, so i could be wrong also. I also believe that phone companies putting camera manufacturer names on their phones is more a marketing ploy. for instance, Huawei P10 has a Leica camera. the P10 lite does not, but the photos from the p10 lite are as good as the p10, except it doesn't have the bokeh mode. Is huawei really manufacturing a totally different camera module for the p10 and lite? that would make no economic sense. it's all in the software to create these image 'looks'. The Nokia 7+ photos aren't as good as the Lumia 1020 photos, and that's a shame. It's giving Zeiss a bad name.
Agreed, the camera is pathetic. A bit of low on light, and it becomes way too grainy and dark. With apertures supported as low as 1.75 and 2.2 that shouldn't be the case. Try out Open Camera app and see if it helps out. I have just installed it and experimenting. Will update my experience soon.