The metagameplay -- rogue reset you, permanently, when you died. Similarly when you die in FTL you have to start all over.

It's both an incorrect term (because, as you mentioned, the overlap with rogue is limited) and absolutely the correct term (because people generally understand what it means, even if they've never heard of rogue).

I think it's important to remember that language evolves, it's more important to be understood than to be correct. Shouting into a hurricane isn't going to stop the storm, no matter how right you are.