I didn't hear about ROG Phone 2 and it has some features which I really like, but I think the killer for me was lack of Micro SD and a better camera.

If only there would be a flagship phone which has all: an awesome camera (I snap loads of photos, the whole "best camera is the one you have with yourself" mantra), big battery and a Micro SD slot, it would be an instant buy for me.

So far I've been upgrading my Samsung Galaxy from 2 -> 4 -> 8+ as that was the closest I could find to what I wanted from the phone, but I'm happy to change to any other brand.