Being in Galileo is irrelevant for all practical purposes other than sending money (our own!) to our space industry. It's purpose is purely to pretend that the EU can guide smart munitions via it's own satellite navigation systems if the US stops us from using GPS (the likes of ships and aircraft can carry alternatives). In practice, this is nonsense because neither the EU or individual countries within the EU (partially excepting ourselves and France) could ever mount any independent operation without US support. Being outside Galileo has no practical impact: we never needed it anyway.
On the other hand, beefing up our own satellite communications capability has actual utility...