An increase in land carrying capacity (disturbances) should be done in conjunction with a massive reduction in animal numbers....then let the herd recover slowly while habitat regenerates. This will allow you more time....and time is what you are managing...more time for preferred native plants to establish tonnage which can withstand moderate browse pressure. Your scenario indicates a deficiency in the quantity of high quality browse/forbs....the only highly preferred forb available is brassica and their tonnage is insufficient for animal demand. Hinge cutting is just one tool to use......TSI proper, prescribed fire, light spring tooth harrow ripping, feeding plots, and planned grazing are other tools to address the issue of limited preferred natural food...each of those has associated costs and repercussions. Disturb the habitat and let it recovery under reduced animal demand...that is how you increase carrying capacity sustainably.....make sense?