I wonder how many people naively thought Flashpoint would actually change big stuff from the other shows. Like outside of Diggle's daughter, I don't think anything else happened.
That were funny times when people thought it would completely undo the previous Arrow seasons.
That's actually a symptom of the continuity, though. They can't change anything big for fear of messing up the other shows. I guarantee you by the end of Legend's season (or, more realistically, the beginning of the crossover) everything will be set back to the status quo.
I'm not fully against continuity here and there are good stories that can come out of it but not everything needs to be connected, either.
They changed a lot of big stuff without caring about each other. That is how flash can create a different timeline and basically being a short extra on Arrow. If they were more limited, Arrow would need to make bigger changes to accommodate the Flashpoint.