The idea is nice but as stated before, civics shouldn't just be raw numbers without at least some explanation. Besides MC already does that in a way. Maybe an expansion of options when playing MC. Obviously more options is always better so civics that encourage/discourage certain play styles at the cost/boots of some other part just so it exists would be nice.
And maybe some ideas of mine just to throw it in here:
Ultra wide, territory wise empire, very vast one - think civic for explorer-like empires, curious guys so -1 adm cost on systems(sick) for some large malus on planets and maybe minor boost to stations mining efficiency.
If we want something for tall, maybe minus admincap and give it instead a unique capital building that gives you jobs per x pops just like some events work(eg. portal or underground civ) so those biggg bigg planets are very strong. Also make it a starting playstyle civic like life seeded and make it impossible to take Efficent Bureaucracy since it makes 0 sense, but make it possible to take Imperial Prerogative(think empire embracing that size matters)