To me, the fielders problem is irrelevant. If you're close, you should be expecting the ball all the time anyway, no matter how hard it's hit.
It's innovative, so the shot should be allowed. If I was the ICC, all I'd say is that once the stance has been changed, the ball has to be very wide to be called a wide (i.e. an offside wide in both directions in terms of distance) and that there is no pitching outside leg for the LBW rule. I.e. where it pitches is irrelevant if the batsman switches his stance.
I think those two changes give the bowler more options and make it less batsmen friendly.
It's innovative, so the shot should be allowed. If I was the ICC, all I'd say is that once the stance has been changed, the ball has to be very wide to be called a wide (i.e. an offside wide in both directions in terms of distance) and that there is no pitching outside leg for the LBW rule. I.e. where it pitches is irrelevant if the batsman switches his stance.
I think those two changes give the bowler more options and make it less batsmen friendly.