I don't think this is a bad thing at all since they're giving more options to the consumers which is a good thing. I for one am turned on, I'm a very large person (6'4 and 15 years old) and I believe the 6.3 is perfect for someone my size....that's pretty freaking stupid.
I really don't see the point in buying those "big phones" - they're too big to be comfortable as a phone and too small to be considered an acceptable tablet - it's the middle ground and in this case, that's a bad thing in my opinion.