I'm about three seasons into The Arrow and about two seasons into The Flash. In the second season of Arrow, Amanda Waller's reaction to Slade unleashing an army of Mirakuru-enhanced soldiers was to send in a drone to raze the entire city, under the idea that she wanted to entirely root out a source of superpowered criminals. Given The Flash seems to have a new superpowered foe nearly every episode, it feels a bit odd that Waller hasn't made similar attempts to eradicate that city. Has this been covered in the show, maybe some case of her realizing that the genie is out of the bottle and that she's better off trying to exploit the metahuman situation rather than trying to eliminate it?
And yes, I realize that this is likely covered in the several seasons I have not watched yet. :) There's a lot of show and I only have so much spare time with the baby.