their desire was to get back to the flavor of TOS where the ship and crew were completely on their own without a Starfleet Command to call for backup,
You know whenever I hear someone describe TOS as "the ship and crew were completely on their own without a Starfleet Command to call for backup" I honestly have to wonder if that person or persons has ever watched TOS, because that was not really the case.
In fact they frequently running into other Starfleet vessels and stations. And if they weren't doing that they were visiting federation member planets and colonies, or had dealings with federation officials.
They thought the whole starship out on his own in unknown space was so interesting they used it for Voyager. Too bad they really didn't do anything with the premise, and it became a warmed over TNG.