Great post from the OP. I agree he should have stuck with his S/V game all along. That was his bread and butter. I miss the S/V days.
If it's the post-season, with David Ortiz at the plate, do you think Mariano in his prime wants to give up a game winning hit with an offspeed curveball? NO WAY. He'd go right at Ortiz with his best pitch, the fastball/cutter! It's true in a lot of sports, that the winners stick with their bread-and-butter (their key to success), even if the opponent knows it's coming.
I just wanted to give my 2 cents and also show my avatar pic of Boris!