I agree with Greatkeen that if it is working than stick with it. I am all for milking all the progress you can get out of any split/program.
I also think Cory makes a good point, that trying to suggest new splits is partially dependent on your goals/focus.
James 1:16-17 ESV
Do not be deceived, my beloved brothers. Every good gift and every perfect gift is from above, coming down from the Father of lights
With God's help...Mens sana in corpore sano