I think your thought process is correct. Lowering the inside rear camber link will free up the rear end on corner entry but as the chassis starts to roll over it will make good traction on middle and exit of the corner. This is where you will want to make sure you have good spring balance and the correct oil in the shocks because your shocks will be responsible for a lot more of the cornering load at that point. Camber is also critical. You'll want to start making minute adjustments to camber as well. One degree increments probably won't cut it.