No, no it's not.
They are soft and can't tackle. Zero pass rush + backup corners now = Nasty evidently.
I don't know that I would be this harsh, but I agree with the overall premise that this Bears defense is not the 2018, or even the 2019, defense.
This defense may be enough to beat bad teams without a good offensive output, but average-to-good teams will exploit that secondary and the lack of pass rush.
I also agree that it seems we've forgotten the Bears D's issue with tackling.
Add onto all that that Mack is being less effective and older each year, Fuller gone, E Jack still not his 2018 self, Trevathan looking like trash, etc. This has the potential to be the year the dam breaks.