even the stock setup can be better if there is any adjustments available, the manufacturer has to decide on a target customer. 6ft tall and 190lbs isnt perfect for my wife or me. And you dont even need (they are way better though) a suspension guru, most dealerships have a smart guy that understands sag and can help out.
My current regular ride Triumph had an Ohlin fork set installed and a progressive Ohlin rear, set for approx 230lbs, me at 190 and 40lbs of gear and it stopped the fork dive issues and washout feeling in the rear in fast corners when loaded.
My last Duc products all came with suspension that was much beyond my requirements but looked very shiney.
@shane, I find the stock Vstrom setup (have a 650 here) sort of wishy washy at speed, but its also a price point bike. I just ride the secondary roads I like and slow down a bit and its just fine. I wont spend any money on it.
Stuff does get tired, springs loose rebound just from sitting and oil gets less effective, a little maintenence goes a long way.