I feel LG just didn't think this through, once you start comparing the G5 to the new competition. I'm really no Samsung fan, but of the two new phones, the LG G5 and Galaxy S7 Edge, you seem to be getting a lot more with the S7 Edge.
Size = 149.4 x 73.9 x 7.7 mm 159g - LG G5
Size = 150.9 x 72.6 x 7.7 mm 157g - Samsung Galaxy S7 Edge
Size wise they are extremely similar, with the larger screen S7 Edge actually almost smaller than the G5, it's narrower and weighs less.
Battery = 2,800mAh in the G5, and 3,600mAh in the S7 Edge, that's a MASSIVE difference in battery.
Screen size = 5.3" G5, 5.5" S7 Edge
Waterproof = S7 Edge only
Wireless Fast QuickCharge = S7 Edge only
Overall, the S7 Edge will give you a larger screen, but basically same size phone as the G5, a massively larger battery on the S7 Edge over the G5, which is a huge deal, water resistant on the S7 Edge. Wireless quick charge on the S7 Edge, etc... I really wanted to like the G5, and I sort of like the design on it, but that 5.3" screen in still a large overall phone is a turnoff, as is the tiny 2,800mAh battery kind of crappy to me.