With all the heat issues these 110's put out, I wouldn't think that covers are a good thing. They are notorious for restricting cooling and retaining heat.
They also come loose, need additional waxing/cleaning, obstruct visual inspections of leaks, cracks, etc.
Most mechanics HATE them!

All valid points I hadn't considered, however from an engineering pov I think if Kuryakyn was the only manufacturer of these covers and not Harley as well, I may give that more weight.
Another way one may see it is that these chrome pieces may act as a heat sink, drawing heat away from slower cooling cast pieces and actually allowing for better cooling.
And as for the Harley Technicians, I would think that as most of them are straight time and not flat rate that they appreciate the extra Labour they can charge when a repair is needed.
And finally, but most importantly, one has to consider that all those shiney bits will make the bike look really nice on the back of flatbed when they have to tow it in.

(seriously... Thanks for your input... I'm just kidding... If you're right, maybe I should send my mechanic a pre-emptive case of beer)