Try experimenting with some temporary in-haulers to see if you'll truly benefit from improved sheeting angles. This is just some athwartships tackle that allow you to pull the clew inboard from the existing track position.
Be wary of the apparent increase in pointing ability.. the underbody of the boat may not support those new angles and result in increased leeway - ultimately reducing your VMG to windward.
These trials will also help you determine how far inboard your new tracks should/shouldn't be.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)