Re: Things Starfleet needs to fix already on its ships.
Well backup systems have been mentioned several times throught the years.
Backups of backups, too. Redundancy isn't the problem with Starfleet ships. It's that everything seems to fail at once or isn't available.
"He clapped his captain—his friend—on the shoulder. Yes, this man was very much like James Kirk, in all the ways that mattered." --Christopher L. Bennett-- Star Trek: Mere Anarachy, The Darkness Drops Again