Yeah, it was cool to watch Vader kick some ass at the end, but it meant nothing and was just another example of fan service.
And like I have stated before if they filmed Vader slaughtering Rebels in the OT literally no one would have an issue with the Vader slaughter scene in Rogue One.
A fully suited Vader slaughtering Jedi in Episode III would have gone over like gangbusters as well.
You’re probably right even though there were only two Jedi alive at the time. I don’t even want to know how someone could try to spin that but whoever can should be leading our country.