I feel for you Samurai mains.
While it's not my main class, I have an alt that has nothing but SAM and a filler class used to unlock SAM on it. I can't bring myself to like the changes, the job just feels worse because of it across board.

Clearly the devs are looking primarily at the numbers-- people still clinging to SAM will give them skewed data that everything's fine. Honestly the responses from Yoshi P, or lack thereof, have been rather disgusting. They couldn't come clean twice as they opted for excuses before giving an ok reason for the changes, and even then they could at least have had the decency to add something to the job to compensate for its loss.
They did not, they hope the bells and whistles of MSQ and island sanctuary will distract from all the baffling class changes.