I agree with the others about the tub… You need to have at least 1 tub per house – but not necessarily in the master. People with kids will not buy a house without a tub.
We’re in the planning stages (as part of hubby’s major plumbing endeavor this week) and have a layout that will be dual sink, shower, toilet. Our current layout is shower, single sink, toilet.
Dual sinks is a nice feature. We’ve survived 11 years of marriage without them – but there will be less jostling when we’re doing the morning routine.