You may like to consider signing this new petition, which needs large numbers of supporters from several EU states (so please share widely):

http://ec.europa.eu/citizens-initiative/public/initiatives/ongoing/details/2018/000003

Subject-matter
European Union Citizenship

Main objectives
EU citizens elect the European Parliament and participate in its work, thus exercising treaty rights, enhancing Union democracy, and reinforcing its citizenship. Noting the ECJ’s view of Union citizenship as a ‘fundamental status’ of nationals of Member States, and that Brexit will strip millions of EU citizens of this status and their vote in European elections, requests the Commission propose means to avoid risk of collective loss of EU citizenship and rights, and assure all EU citizens that, once attained, such status is permanent and their rights acquired.