Agree.
My 5S works perfectly well, and I'm very happy with it.
My opinion is that the 5S and 4S have been the two best iPhones produced.
I dislike the 6 series design, particularly the antenna lines and the non-flush camera lens.
And it appears these won't be changed for the 6S.
So even though there is likely to be a RAM increase, and CPU/graphics speed increase, as usual, and some Force Touch thing.. I am currently planning on sticking with my 5S for another year.
Plus, I do like the overall small size of the 5S.. a bigger screen would be nice, but still within the overall device size of the 5S. I just find the 6 too big a device for me. Perhaps the 7 will have a 4.7" display, but in a smaller overall device size. With nicer styling too!
But of course I'll be eagerly watching the keynote next week, in case there is something unexpected and awesome!