Well they aren't necessarily incorrect, TTLs can be a pain. However that's why when you do a migration you lower the TTLs and eat the cost of lookup requests.

Well they aren't necessarily incorrect, TTLs can be a pain. However that's why when you do a migration you lower the TTLs and eat the cost of lookup requests. Wait until your previous TTL lease expires (which is 2x the TTL) then start the migration. After everything is known to be good you up the TTLs again. That way you have a way to "quickly" recover if issues arise.