A question should be migrated to ELL only if it is appropriate for that site. If it isn't, then migration only clutters ELL and makes more work for its users who have to read through the question and then CV it.
ELL's standards can be found on its help pages. (Unfortunately, the situation isn't quite so simple; the criteria for ELL questions can be scattered in other places, as well, such as its Meta site. However, that's an issue for ELU, too. Perhaps one day we'll get a definitive list of what is and isn't appropriate for the site.)
For your #2, the CV reason that I believe you're referring to says:
Please include the research you’ve done, or consider if your question suits our English Language Learners site better.
The second half is admittedly a bit vague (after all, migration to ELL already exists as a separate CV reason), but the first part should certainly only apply if the question actually fails to demonstrate (enough) research. If "the answer can be quickly looked up", then such a question would seem to me to be a good candidate for this CV reason.