Its much easier to use the bounce of the club when its bigger. I've got a collection of sand wedges from a Walter Hagen concave face model as used by Bobby Jones in winning his Grand Slam , to an old 1930's Wilson R 20 to a couple of 1959 Wilson staff Dynapowers . Those clubs were made for the sand specifically , their big bounces and heavy heads are a delight to play a sand shot with. Makes me wonder about finding a modern club with a similar grind.
Hackers come in leading edge first digging , good bunker players bounce the club off the sand using with the bottom of the club making contact not the leading edge.
With todays modern , more dual purpose, less built in bounce sand wedges , opening the plane line and aligning the face to the hole exposes more bounce .... effectively increasing the bounce angle. Same goes for coming into the ball with very little shaft lean. With the shaft vertical, as it should be at Fix. Dont get the hands too far ahead with this particular method. This is what Yoda teaches in the sand. Not a hinge and hold deal more of a fullish sweeping easy swing , early release and a vertical shaft at impact. Just like Luke Donald's method . You have options of course , but Luke Donald is pretty darn good with this shot out of the sand or off the turf green side.
Can it cross over to intentional throwaway ? IMO if you scoot the clubhead ahead of the hands and employ vertical hinging it will. Bend the left hand that is, the definition of throwaway. It can produce a super high soft shot but it demands extreme precision . Yoda teaches this shot too, green side normally off of grass with vertical or horizontal or angled .... its in the book 10-3-J Pause Minor Basic Stroke although the accompanying photo shows horizontal hinging with a flat left hand .... not throwaway then. Me I like to stay comfortably back of low point by an inch or so and go extremely open with the plane line before resorting to intentional throwaway..... I find it far more reliable. I keep the hands going through the shot , situation normal , no pausing but im releasing and the shaft is vertical at impact. Vertical hinging. BTW anyone remember the trick sand shot Seve used to do where he'd lift his left leg off the ground and swing between the clubhead between his legs? Hitting these beautiful little cut lob shots! Even with a long iron! Thats a Pause stroke if ever there was one as his hands come to a dead stop against his uh.... inside thigh area.
Daluqfam, Bottom line all of the three types of Steering and forward ball positioning , and extremely open plane lines with their associated increased effective loft and bounce and early release, bigger pulley wheel and gripping down to shorten the radius and Vertical Hinging and even throwaway are available to the golfer to be used as machine adjustments , tools to lessen compression. Everything that can be employed to increase compression can be reversed to intentionally decrease compression.