Transitioning between best glide and stall is a necessity for landing, on or off field. Continuous flight below best glide expends energy faster than necessary. Burning off energy with flaps, gear down, speed brakes, step extension, (if desperate slips) are acceptable methods. Flying along in a mush seems a poor choice to expend excess energy. Maintain best glide speed until transitioning to stall speed before touchdown/impact.
Unless, of course, you are in a short landing competition or flying into St. Barts, then mush away to your hearts content.