Jysin: Those 3 "features you're losing", you're only losing with Samsung - they're not absolute losses because of "better design" they're lost because of Samsung's version of it.
M8 has upgradeable memory and are water resistant. (And the M9 is water resistant enough that they added it to their "we will replace it if there's any X free" program - M8 went through some dunk tests and the worst that occurred was temporary speaker loss that came back when it dried out) And I'm pretty sure G3 has upgradeable memory as well.
Battery is the only legitimate worry with manufacturers in general, but recent batteries since the move to "design" have had amazing lifespans that make them have no need to replace. Hell with the currently memory leak prone version of Lollipop on my M8 right now at just over a year old now I think (or maybe it's a year next month) - I keep hooking it up at night with over 50% battery on days I use it heavily, and 85-90% (seriously) on a few when I use it extremely lightly. Not once have I gotten to a "needs a charge midday" issue and it's roughly a year old.
As for "dings" in that picture, looks to me like your screen is peeling up in the middle there. That doesn't look like a nice even line.
Not to mention, that has better "Build Quality" than just a few years previous - Galaxy Nexus my first smartphone was poorly reinforced on the sides compared to that. You seem to be using it as a codeword for "must be all metal" that many are doing this year - but build quality has been a thing for a while now, you're using the example of one of the best built plastic/metal hybrids that were still mostly plastic. [And I've seen plenty of properly cracked S4's]