Dutch attitudes to migration more nuanced than political debate / Dutch gov't taking steady action to discourage expats from coming to Netherlands / Dutch expats urge government to modernise passport system / Immigrants who stay longest in Netherlands are people who joined family, asylum seekers / EU ministers stress unity on immigration, dismiss Dutch opt-out / Grip on migration, simplified procedures Dutch gov't priorities next year: King's Speech / Dutch government eyes emergency laws to curb migration / Dutch parliament wants Cabinet to limit labor migration from non-EU countries / Dutch passport still 3rd most powerful in world; Dutch can visit 191 countries visa-free