Produce a Sport version.
The current one is so RTW that it is a waste of tough for many of the potential wannabees out there.
Just like the GS is to the GSA. The S10 is almost perfect for me but I can see it in YAMAHA's best interests do a lighter more road biased version.
Paint the engine and swingarm etc with nice clear over silver, it will look like shit in 10 years but reviewers won't pick that up.
Plastic Tank. (20Litres)
Move the rev range up 1500 RPM.
Some Nice feeling switch gear designed by Lexus. (They already work together so why not)
It's too tough for most right now and not many need it. I mean how rough does it get in the Alps really?
Look at how the English press test them, All tarmac, high speed etc.
Do a TV travel series with real ADV types (and one movie star). They can all take turns trying to harden the movie star up.
On the current S10?
Tougher fan bracket with Positech fuse and a dash warning about stalled fan.
Lighter would still be appreciated but like DC said, there is already a lot of lightweight stuff on the bike (the reasonable cost stuff not CF)
I assume they would have to make a thinner walled frame, less thick engine components etc. So not too much. Don't want to get into BMW territory here.
Led blinkers. Those standard ones look really "Scooter"
Tougher spokes,
10mm more Suspension travel.
Real bash plate option with new mounting points.
Flatter seat for the Yanks.
Breather tube on the shaft vent (AKA HP2 BMW)
Slightly louder exhaust.
More damping options for the rear shock.
Sideways Air Filler necks on the Wheels (whatever they are called)
Plastic 27L tank would be cool. (with option on the Sport) with integral scuff pads.
Seventh gear. (Lower the rest a bit) [edit] that should be at the bottom of the list. Not really a big deal
Tougher looking, water proof switch gear. [just for impressionable people, I bet the current ones will be just as reliable as most Jap bikes]
That will keep them busy.
But I suspect that they may come out with "exciting new colours" for a while, which is a pity because a few issues addressed at a time doesn't take much but gives the reviewers something to talk about. The stores however are stuck with a sudden depreciated item though.