I never thought I would ever have a microwave in a camper (nor an air conditioner for that matter.) My current camper came with those niceties and then I bought a generator to power them.
I like having the MW. My annual hunting trip is now the main reason for using the TC and I will camp for up to 10 days. Planning and precooking food at home and then heating them up in the field make for hassle free good eating ... and quick! This allows me to get into the rack early all fat and happy while my comrades are still pumping up the Coleman.
I think you will be happy with a MW. I would not fret losing this little bit of storage especially if you are pulling a trailer for stuff.