I really love the fragment system, it didn't take me too long to find the ones I wanted, but long enough that I felt like I'd explored a few different areas of the world!
That being said, I'd love to see a sort of instruction manual/tuto…
I agree that they're a bit too big, I think maybe designated inventory slots for certain items (like DayZ) would be cool. Maybe have 2 slots for tanks (different capacities), 2 tool slots and 2 other slots for additional equipment?