In a word no....
For some of the reasons you have already mentioned.. ducks are incredibly messy with their poop and make the floor of the chicken coop wet and smelly...
Also the issue of water comes to mind... ducks need a deeper water drinking source than chickens, they have a habit of making the water dirty and that ( in my opinion ) is not healthy for the chickens to drink from.... one solution to think about.... separate the coop into two distinctive areas..one for the ducks and another for the chickens.
My ducks have frequented the chicken coop during daylight hours and have left behind a terrible mess, they are now barred from entering the coop - I am lucky in that I do have plenty of housing for ducks,chickens and geese to be housed with their own kind.
Suzie