I agree, there's nothing wrong with a zero deck piston. I don't know about stroker motors but it's the rpm's that it turns is kinda high for a long stroke long rod motor?
I ran my W5 stroker right at 7500 through the traps for years. This was 4.100 bore/ 4 inch stroke and 6.300 compstar rods, I used to race a ton back then, points, etc, etc.