So, umm... If you already have more dragon bones and scales in storage than you'll ever need, even if you get hired to outfit the entire city militia with dragon armor, and your main complaint about dragon encounters is that the dragon bones and scales weigh you down too much... Why don't you just stop hitting "take all" and leave the dragon parts on the carcass? You don't need them, carrying them annoys you, so don't take them.
The corpses seem to persist if you don't loot them. I had 1 dragon corpse persist for weeks in game before I finally took everything off it then it disappeared in a day.
Besides I can always use the gold, it's just I set myself off to do a quest or explore somewhere, kill 1 dragon and am 100 pounds heavier and have to sell off or whatever and I'm no more closer to doing the quest or exploring the cave.
I'd say the chief complaint though is that the frequency cheapens the experience of a dragon fight.
Though at my level with a legendary crafted daedric bow, and over 80 archery and sneak pretty much any fight has been cheapened, realistically. I 1 shot giants and 3 shot normal dragons.
My bow isn't even enchanted cause I haven't gotten it up high enough yet to make an enchant I'm happy with (and daedric hearts are rare)