Accusing one SF property of "Ripping off" another is 100% unproductive for the genre. The reincorporation and combination of existing ideas is how new ideas are created.

Mass Effect is literally just Babylon 5 and Battlestar slapped together and painted over, and it's amazing.

Short of literally setting things in other people's universes which I absolutely do not approve of, I'm totally in favour of taking heavy inspiration from old IPs to create new ones.

The genre desperately needs new IPs, but they don't all have to be hyper-original gamechangers.

Wing Commander is a great example of this. It takes a colossal amount of inspiration from Star Wars. But it doesn't matter.

WC is it's own world with compelling characters and emotive journeys, who cares if it has a similar vibe to some other thing?