Does it matter if diff mount bushing is blown?

SkysG37

Always thought Z's had a solid rubber bushing and the goo was only on the Infiniti chassis.
NVH vs performance, respectively.

Have read some people simply fill the stock bushing with a two part silicone or some such epoxy.
Fine for a daily that never gets driven hard, I suppose
I opted to swap in a whiteline bushing and brace.

But I see there are stiffer braces out on the market now.
Also seen the use of a pathfinder diff, that has two bushings for support. But that necessitates adding a second hole/sleeve and bushing to the rear subframe.