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(II) So this is basically subvariant of old Rotation Chess, http://www.chessvariants.org/mvopponent.dir/rotation.html and http://www.pathguy.com/chess/Rotation.htm -- that pre-dates Neto's 14-year-old Mutators. There are thousands other ways "to elevate the complexity without affecting the theoretical size of the game tree," http://en.chessbase.com/post/a-new-challenging-chess-variant, and all deserve batch or individual consideration.

In SSCC should serial Switching be allowed? The example shows spectacularly Player A moving 14 times in a row to ultimate checkmate.  The '5...d4!'
really highlights onset of one of many possible quasi-Fool's Mates inherent in present SSCC, not a great move by and of itself.  In other words, wresting control for 14 plays in a row so early is either a blunder by Player B or cry for designer to rein things in.  How about enhancement in further subvariant: Switching up to twice or thrice and four times dis-allowed?

Appealing about the Rotation CVs is the ability to catch up. By comparison, other CVs that have that quality somehow are Rococo and Chess With Promoters and many 3d CVs.  SSCC certainly dispenses with opening theory by its extreme single Rules addition.  Also to credit of Rotational Chesses is tilt to strategic planning from tactical planning, favouring biologic intelligence over computer, as M.A.M. Iqbal describes. Since two or more empty spaces are desirable, keeping the same familiar small board 8x8 may be main cause of the runaway takeovers by one player or the other for 10 or 12 moves to Checkmate.  Improvement to SSCC might come by enlarging board to GM Reshevsky-endorsed Zonal form, http://www.chessvariants.org/shape.dir/zonal/zonal.html, or to Morley corridor form, http://www.chessvariants.org/shape.dir/morley.html.