Tim,
I just read this today and I respect your decision to wait until you feel it is safe to launch.
Smart decision. Nothing else needs to be said. It takes a smart man to realize his shortcomings and address them head on.

If it is not yet perfect, the negative perceptions will only grow exponentially as you add users on a less-than-perfect system/product.
You are smart to avoid the "woulda, coulda, shoulda" critics by mapping out a sound plan for transition to launch.
I've launched many telecom products in my career and this is the approach I'd take.
Don't rush things - all good things come to those who wait......as someone once said.

Also making continual staffing and management adjustments may sometimes sound ruthless but it is part of being a good businessman.