I think they're aware of their critical failures, and will react in some way regardless of their "profitable but not as profitable as we hoped" box office. Financial success is why we've gotten as far as we have, but I think there will be a breaking point where they won't be able to continue as planned if the movies aren't better received.
I could be totally wrong, or I could be on the right track but wrong about when we hit that point, but I am not convinced WB will keep this up much longer. Certainly not long enough to crank out JL2, The Batman, Man of Steel 2, Aquaman, The Flash, Cyborg, Shazam, Gotham City Sirens, and now Batgirl.
Otherwise how do you explain the trouble finding someone to work on The Flash, Affleck scaling back involvement in The Batman, the slight production shakeup last year, etc.?
Not hitting their targets and bad reviews will have consequences—all of which have been behind the scenes so far, but eventually that will add up to some of these movies not happening if Warner can't get a few unqualified winners out soon.
And @Telefrog said this all better while I was editing my draft of this post.