This 100%.
Whether they keep Dak long-term or let him go in a year or two.....there are too many Shanahan coaches out there now and they are blocking the Boys path. Defense looks lost EVERYTIME they play one of those offenses.
Even if they cut Dak right now and put in Trey, the team still needs to fix the trenches on both sides and improve the flexibility on D.
My guess....is that the Cowboys defense isn't "smart." Mike Nolan's defense required a lot of thinking and they played like shyt. DQ has a more simple scheme and it's easy for players to jump in and play well. They are good in man coverage but when they run zone and need discipline....team looks lost. When they have to think and dissect, it's a shytshow. Niners bruhs on D are sharp and adjust on the fly.