The question is though: would you prefer a) a half-baked feature where coding is 1/10th of the effort and you're still left with 9/10th of the work for the maintainer/community or b) a small, but undeniable improvement?
OpenBSD would obviously prefer the latter, but other hackathons are sometimes for the purpose of just generating new ideas or getting new people involved - in those cases broad scope is good and intentional.