Thinking of reformatting my phone too and only install what I really need. Even though it feels like I have already done that. I just don't have anymore space on my phone.
I'm also trying to predict what the LG G4 will come with, as I'll probably upgrade to that one.
Snapdragon 810
5.5" QHD display
3100mah battery
16/32gb
Dunno what else.
3500