May need advice on 727 build

They came from the factory with different amounts of springs but the release speed is all that it changes really.
Some people think that the more springs the less power the cluches can hold engaged, but beleive me the hydraulic pressure is WAY more than the springs can resist.

If there is end play in the planetaries, then not only will you need to replace the planet set but also the ring and sun gear they engage or you will have a noisy gear.

The uneven wear is probably just warped steels, and those should be replaced along with the new clutches.