I owned the S5-S7 and the S7 shyts on the S5. The only real thing the S5 has over it is a removable battery. The S7 is probably the best phone Samsung can make. At this point they'll have to go back to adding gimmick features to outdo it.
The s5 also had the IR blaster, which I miss at times, but I've been watching everything thru the ps4 so it only served the purpose of TV powering.
Besides that, s7 is better in every conceivable way. I don't even miss the battery swapping.
I just started using samsung pay and my god. You can use it at none NFC credit card readers. When I get up to the counter and they say they don't NFC but I pull out and pay with my phone anyway, nikkas be looking at me like a magician lol