I’m just about convinced to do that myself.
I thought about removing it before when I wanted Wild Rides upper and lower torque boxes.
The metal on the stock upper torque arm mounts is much thicker than the assembly they are spot welded to, so it's really about the same effort to remove the entire assembly IMO. You still have to drill about 9+ spot welds out of each mount to release it from the frame rail, but there's at least double that to get just the mount off by itself. I totally see why these things get ripped from the floor during hard launches, there's only one or two spot welds holding the assembly to the floor pan where the mount is located. Not sure what the factory was thinking there.
Once it is all removed, I'm going to weld a 1 1/2" .083 DOM tube between the frame rails where the trunk floor meets the rear seat area. This should strengthen the floor where I removed this assembly and provide lateral support between the frame rails.