Unfortunately, maintenance of the Denali Highway is not a priority for Alaska DoT/PF. That being said, most of the gravel roads get a fair amount of attention after breakup as the roads open up for the summer....and with the snowpack and slow spring much of the state is experiencing, the Denali might get scraped a time or two just in time to be relatively smooth for mid-to late-summer travels.
The key (as it has been since my first trip across whilst dodging dinosaurs :) ) is to take it slow on that road. The couple of times that I've taken a leisurely drive across (either Cantwell >> Paxson or the other way), my least damaging trips have involved at least one if not two overnights on the road.