Also, is gaining influence gonna be easier yet still dependent on how many people you have?
This isn't to say, Major Factions shouldn't be sprawling & active. But, if it becomes easier in practice to gain influence; there should also be a harder level of quality control.
This should be to help more niche ideas blossom, more interesting narratives get bigger spotlights through having more avenues available than the eventual burn out given by endless dominions, not to help massive groups quickly gain a chokehold on the Galaxy.
Also, how is this ease of influence gain reflected in-world? It makes sense for a conquering army to spread quickly, not for a democracy or confederacy.
Just be careful to make it easier, not lazier.