In terms of defence, and to my knowledge, Abrams just lacks efficient measures.
For statrters, in top tier, nobody lands their first shot on your turret no matter what tank you’re in(non pen 99% of time) ,even if they have to, it would be barrel.
And the hull armor just physically can not block rounds shot by its counterparts.
And other defence systems just don’t exist.
No LWS
No APS
No Spall liner
No Relikt-like ERA
In addition, incorrectly modelled hydraulic pump, turret ring which is too weak are worsening the situation.
Therefore Trophy is a good defence system upgrade