I think this could be done incrementally. First just reduce the starters limitis slighty,
Use relievers just a little more, instead of starter 6, 1,1,1, starter 51/3, 1-1/3, 1-1/3, 1... little difference... go more extreme the next year if things look to be working. Basically year 1 kind of run it like Francona just did.
Year 2, maybe go more extreme, and go to a four man with starters on an 80 pitch limit or something.... and start to morph 5th guy, and second level relieves into long men