ExploderWizard
Hero
I agree 100% on this. Focus on the player's ongoing choices is key.
That said, with mechanical build choices being presented, I think players have a reasonable expectation that those choices will also be respected by the system. Otherwise, why are they being asked to make them?
Cheers!
Kinak
I see mechanical build choices existing for the sake of variety rather than a mini game to be "won" on its own.
So build choices made to realize a character concept remain valid no matter what the party finds in it's adventures.
I also hope the DMG addresses the issue of magic item destruction. In my games it can often be easy come easy go. Magic items can be lost or destroyed, new items found, etc. Think of magical items as goodies rather than the core of your character and when they are lost or broken it won't be the end of the world.
In the classic 81 movie Clash of the Titans, Perseus begins his adventure with a magical helm, shield, & sword. The hazards of adventuring cause his helm to be lost in the swamp, and his shield melted by Medusa's blood.
Two out three permanent magic items consumed in a single adventure!!! Does he cry foul and demand that the gods give him back his stuff?
Nope. He keeps trucking on doing his thing. The gods send him a magical owl anyway.

Even artifacts can be lost or destroyed although it may be harder to do so.