I know the M151s had a tendency to over steer (ass end comes around) and for an unskilled driver this is dangerous and unpredictable. SO they went to a more conventional design that the average enlisted person could drive safely.. At low speed... While most cars are configured to understeer (plow/push) as you slow down your steering comes back.
All of the issues you've mentioned or similar were faced with links. The flopping effect was solved with sway bars... once deemed restrictive came back as an way to balance your suspension.. The COGs went from OMG to super low riders you see now..
