They areTheyre not moving away from shared universe tho
Not gonna happen overnight, nor will they abandon currently successful movies like wonder woman and aquaman, but they are clearly moving towards stand alone movies that are contained in their own universe.
You will see more movies like joker that stand on their own, and less movies that share a universe going forward. Eventually the shared universe will be phased out entirely unless some miracle happens and the public perception of DC movies changes.
I'll even go as far as to say the next batman movies will not be apart of the DCEU. Superman might not get another movie for a while. Wonder woman will be part of the DCEU but will make no mention of any of the other movies, which is probably why they are setting it in the past and not the present.