Thad will get the money cleared up by the other guys. I certainly will be fine with letting Evans and WG walk in 3 years. Again, my worry is that Sam's 12M will be seen as a way to stay under the tax- and he won't be extended or replaced for tax reasons.
By then Iguodala + Brand + Young could account for 42M, not leaving much space for a 10M+ quality center and PG(maybe Lou will be starting though?)
I know this is hard to project into the future. The main point is that you can only spend so much money under the tax, and Iguodala, Brand and Young will be making a ton, so the team would need to be willing to pay the tax to add 2 other top starters that are at least at the quality of Miller and Sam. Fortunately, their bench of Speights, Lou and Smith should be solid and affordable.