The last couple times I've made big architectural decisions that would be expensive/impossible to change, I've bounced it off of a small number of trusted folks

The last couple times I've made big architectural decisions that would be expensive/impossible to change, I've bounced it off of a small number of trusted folks first. This is almost nothing like a formal critique like you see in the arts, and I do think formalizing it a bit more could be useful. But yes, one of my first reactions to a lot of bone-headed choices I see is usually, "nobody noticed that X would happen?"