All three of these are real. The audit pass in Ossature is meant to catch the first two before generation starts, it reads across all specs and flags underspecified behavior, missing details, and contradictions. You resolve those, update the specs, and re-audit until the plan is clean. It's not perfect but it shifts a lot of the discovery earlier in the process.

The third point is harder. You still need to know your tooling well enough to write a spec that works with it. That part hasn't gone away.