1) I agree 100% with the above, the fairings should be easier to remove for oil changes and such. I hate dealing with those annoying clips. Or at least make it possible to replace the oil filter without removing the fairings.
2) I wish it had the engine temp listed as a number instead of just a bar. Not a big deal but I'm used to seeing an exact number.
3) Would be nice if it had an ambient temperature gauge. I recently demoed a bike that had it, can't remember which bike it was, might have been the NC700x. A compass would be nice too.
Other than that I can't really think of much else to wish for. I guess the ability to run on regular gas instead of premium would be nice, but then I guess it wouldn't make as much power.
I have to disagree with some of the stuff mentioned earlier like cruise, quick shifter, etc. If they included that from the factory then the bike would have been more expensive. I like the way the GSXS is a no-frills, light sporty tourer. It's cheaper, lighter, easier to work on, less stuff that can break down, etc.