sometimes to much adjustability can be a bad thing, people fiddle when they don't really know what there doing and makes things worse or even dangerous. See it all the time on the sports bikes, alot of them have adjustable ride height, rebound damping, compression damping etc front and rear and people mess and make things worse.
IMO for road use and the occasional track day fixed damping is fine, if your planning to get heavily into trackdays etc the adjustment can be handy, and maybe as things wear, down the line, the adjustment can be used to compensate for this