I'm wondering the same thing now... why would Samsung risk tarnishing their name when the GS4 is already considered the fastest mobile device in existence?
The only thing I can think of is that they could care less about their integrity or corporate image... they simply need to focus on catering to a tech-obsessed population with the fastest, highest resolution beast of a handset, everything else be damned.
What's wrong with a few "hardware optimized" apps to ensure that crown sits atop a Samsung device a bit longer?