EDIT: Responding to Grizz, before boidown posted:
How does that justify "wheels down" earning more points than, say me with 1/2 wingtip gone, 1 flap out, 1 elevator missing, no rudder, and coming in belly landing after getting 5 kills?
There's no way to enforce it because there's no way to tell if it was intentional or if it was for extrenuating circumstances. The game cannot read the hearts and minds of the players to determine if they're cutting corners or pulling off a miraculous save.
It's pretty simple Krusty, if you land with damage you should receive less points than if you land a 100% unwounded bird. Both score points & perk points, the weight of that difference I do not know but I think it should be taken into account. It would also make sense from a real life perspective, just because you landed a plane missing half its parts on the concrete, I hardly think the crew chief would value that the same as bringing a bird back wheels up, with no damage on the grass next to the concrete do you?
So per your example, if you landed with 1/2 wingtip gone, 1 flap out, 1 elevator missing, no rudder, coming in for a belly landing, yeah it would still count as a "successful land", but you wouldn't get as large as a point & perk point bonus multiplier for all the damage you accrued earning those 5 kills. And how this relates to belly landing, since belly landing an otherwise clean bird would damage it, this would be a carrot as well to land with a gear.