56 degrees seems to be the standard for a sand wedge although plenty of people have other lofts (54 seems to be popular). Most teaching I've seen shows how you should take your 56 degree, open your stance, open your clubface and use this added loft to give you more height out of the greenside bunkers. Fair enough.
Thing is, if I open my 56 the loft would probably become about 60 degrees, and I have a 60 degree lob wedge anyway. Wouldn't it be easier to just use the 60 degree lob wedge and hit it with a square stance and square clubface? This would give me the same height/trajectory and give me a larger club face to hit whilst allowing more room for error? Also the grooves of the club would be straight on allowing more backspin once it hits the green.
Is there some benefit to opening a 56 degree that I am not aware of?