I've seen a lot of bikers over the years drop their ride just coming up to a stop sign or come up to the sign with their feet splayed out trying to keep control. For some people using the rear brake and the throttle at the same time doesn't make sense.
Don't know why, but I always feel unstable coming to stop not using both brakes? Occasionally, you can't use both brakes (wet manhole covers, cattle grates etc.), but, never have felt comfortable using just the front brake coming to a stop. Ideally, head up, look forward, one foot down at a stop.
But yeah.. I use the throttle, rear brake and slipping the clutch in slow speed maneuvers. Empty parking lots for practice (which I still like to go do, on occasion).
You can also use the fact that a bike will fall over when cutting power, to your advantage - especially from a stop at greater than a 90 degree turn.. Pull forward slightly, sharp turn of the handlebars, cut power to the rear wheel until the bike falls, then stand it back up with a little throttle.. You can make really sharp turns from a stop, in really tight spaces, doing that.