I see your reason for concern: you are literally right across the hall from the laundromat. Very few people do laundry early morning or late at night. And there are laundromats on each passenger deck except Plaza and Lido. And the laundy has good solid doors, so you won't hear much from inside. But there will be more foot traffic around your cabin door; and sometimes the areas around the laundries are a little warmer and more humid than the ship in general.
But I must tell you, I have been a member here for some time and I can't ever recall anybody complaining about the laundromats; and we've had some pretty good complainers. I think the advantages of an oceanview outweight the slight bother you may experience from the laundry. Your cabin is an obstructed view, but you are right between two tenders so you will actually have a pretty decent view.
I would say, "keep it".