The fists are doing really well. If anything its their sucessors that are taking a beating. Save the Black Templars their most famous sucessors like the crimson fists took a pounding in recent years. And every other space marine chapter has lost their primarch and suffered for it. 

its chapters like the blood angels and its sucessors that are really close to the edge. Nearly all of the chapters relating to sagnuinis are expected to become extinct or dam close to it within two thousand years simply from the black rage. If the constant warfare doesn't get to them first. 

And I love the look of the fists. I find they look rather regal, The nick name Preatorians suits them well.