When you presume to change, alter, add or subtract words from the liturgy, at that moment you cease to be catholic - small c - because you cease to express with others the universality of the Catholic faith.
The phrase "for us men..." is not a reference to men as opposed to women. 
It is instead a reminder that as human beings we thank God for sending his Son to redeem all of mankind.
While feminism prefers to argue against words like that - including huMAN and MANkind, the concept remains the same.
Christ came for all human beings, not birds, dogs or bacteria, in order that we may be saved.