When remodeling and working with a specific area of square footage it always comes down to trading off what is less important for what is more important.
If your decision to add walk-in closets is going to seriously decrease the size of your living space and make it feel cramped or too small, it is our advice to scrap the walk-in closet plan and stay with the arrangement you have. People are more accepting of the more traditional closet space than being inconvenienced by a lack of floor space.
God luck with your renovation project,
The "Eckler Team"
I agree with Erik. I would add that if you dont have room to do a walkin, then at the least, add some nice (not wire) closet organizers to best utilize the space you have. That little extra punch adds up, especially if its in each bedroom closet. Make sure your master bath has 2 vanity sinks. The biggest complaint I hear, even in some of the new construction is the lack of 2 sinks in the master baths.