With inflation running at over 1 million percent and the murder of political rivals’ families most would say that it is already a complete failure. However, the “global community” doesn’t want to hear the solution, return to rule by those most capable, i.e. the white settlers.
You can never go back.
In the first place, a majority of Zimbabweans probably buy into the 'restoration' of black dominance over white 'outsiders'.
Second, far too few whites would be willing to return, they'd have little to work with, and the word 'carpetbagger' comes to mind.
Third, other African states would go nuts opposing any progress.
And, if by chance they were able to make it work, and as soon as protocol allowed for it; the campaign to end apartheid / white dominance / colonialism would start all over again.