писала тут девушка, которой отказали в гражданстве по причине "проживания" на севере, хотя она туда только ездила

по её словам - в мигрейшене ей сказали, что один раз она не вернулась оттуда

да

и главное - никаких разговоров про политику

не то что бы срок смены внж для dependents был сильно ограничен, но да, подать нужно
подача на пмж/гражданство не даёт права на проживание

https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32004L0038

(b)

have sufficient resources for themselves and their family members not to become a burden on the social assistance system of the host Member State during their period of residence and have comprehensive sickness insurance cover in the host Member State;

4. Member States may not lay down a fixed amount which they regard as "sufficient resources" but they must take into account the personal situation of the person concerned. In all cases this amount shall not be higher than the threshold below which nationals of the host Member State become eligible for social assistance, or, where this criterion is not applicable, higher than the minimum social security pension paid by the host Member State.