We'd really prefer not to do more rebalances...
...though there is something to be said for "real programmers ship".
While this is of course ideal, there is really no substitute for making a change and seeing the result. Closed-circuit tests will never be able to fully illustrate how players adapt and make changes to gameplay and style based upon a new set of circumstances. So while I can understand the ideal, I think waiting for a "perfect" rebalance will only mean that changes are never actually implemented.
I think that this thread and others have made it quite clear that regardless of what changes are made, some people will be happy, some will be upset, and some will recognize the benefits it brings to the game. Ultimately though, once your other concerns are met (with regards to figuring out what you mentioned) you just have to try something and see what happens.