I'm not sure what people expect Samsung to do? It's fairly obvious the S7 wasn't going to be a drastic change in terms of design/appearance, it didn't need overhauling.
The S6 had a very premium build to it and this design only needed tweaking which is exactly what Samsung have done by curving the back, reducing the camera hump and packing a much bigger battery whilst only increasing the overall thickness by 1mm.
Also the "they've just added features that were present on the S5" is such an over simplification. The S5 was IP67 rated and required physical port covers for the MicroUSB slot, the S6 is IP68 and is sealed from the inside. A completely different approach and challenge engineering wise vs the S5.
When push comes to shove, the S7 can't be matched in these areas by anything that's been announced:
- Screen - DisplayMate are raving about it
- Camera - 100% dual pixel sensor coverage is impressive. There are APS-C sensors in £1,000 CSCs that don't even have this
- MST - A big plus for Samsung
Plus you can get all that without having to concede in other areas as you're still getting fast charge, wireless fast charge, Qi and PMA support and the latest SoC.
Being different for difference sake doesn't make a company innovative, especially if there's little benefit. The camera module is just an additional battery with a shutter button and a scroll wheel that controls digital zoom. The Sony QX was a similar strategy in terms of bolting something onto your phone and that failed to sell any decent volume, despite it actually adding a better sensor and optical zoom to your device.
The DAC might actually offer an increase in audio quality, but it has limited appeal to the masses. A very small % of people in the grand scheme of things are storing their music locally in a lossless format, with a DAC and decent headphones. Majority of people are happy steaming songs via Spotify on their iPhone and listening through the default Apple earphones.
So in my opinion, these "magic friends" aren't even beneficial on their own merit, that's before taking into account that the base G5 has a smaller battery and worse screen than the base S7.