I would take a look at what master bedroom sizes are for similar sized homes. I am sure you aren't thinking of resale right now but we are running into this as we are trying to sell our home. People love our home but not the size of the master. So it being too small could be a deal breaker in a future sale no matter how far down the road it will be! From what I have seen in today's standards 11x15 is small for a master.

Who does dishes these days? My sister and I used to wash and dry 50 years ago.