It was a realistic ending which is why it’s got some people agitated.
The higher ups are, as is usually the case, more interested in how it reflects on them than whether it’s the best outcome for everyone. The last man standing was the quiet one who didn’t get actively involved in sorting shit out. A reorganisation always looks good to those watching from the outside. All just business as usual in corporate Britain.
It’s just that after the rollercoaster of twists and turns that the various seasons have been, the run into the station at the end was a bit, well, anticlimactic.