The Open Office eco-system is larger, by far, than LO and AOO. Maybe LO may not benefit at all from a permissive licensed core (although it certainly has benefited from it, as noted elsewhere), but certainly other OO implementations might.

We have seen, and even the FSF admits it, that open standards do best with permissive licensed implementations. So if you want wide adoption of open standards, a permissive license is likely better.

The world is not just LO or AOO. After all, the enemy, so-to-speak, is this proprietary s/w called MSO...