I think it's a mix of both - I'd kill for anyone at my current job to spend more than a bare minimum of time on their acceptance criterion so I don't just feel like I'm writing code and hoping it does vaguely what the person wants. What the GP is describing feels a bit too far in the other direction, but I'd almost rather it trend towards having an over-prescriptive ticket I can push back on then playing telephone with another department because they gave me 3 sentences of writeup for a month/quarter long project.