So question is: shall I try to migrate these questions or is it ok/acceptable to simply ask them at dba as well? In my feeling they are ok at both sites (borderline development / DBA issue).
Please don't post the same question on both sites. You can flag the questions to have them migrated, instead of waiting for 4 others to feel the same way as you through voting to close, but I already have. You'll just need to wait, but you will get notification once they've been migrated.