Mnangagwa gave key jobs to two top military officers, including Sibusiso Moyo, a major general who on November 15 went on state TV to announce the military's takeover -- a power grab which climaxed a week later when Mugabe quit the presidency.
According to a statement released late Thursday, Moyo was appointed foreign minister while the long-serving airforce commander, Perence Shiri, became minister of lands and agriculture, a vital job following the controversial seizure of land from white farmers nearly two decades ago.
"The deployment of senior members of the military into the cabinet is profoundly shocking," said Piers Pigou of the Brussels-based think tank, the International Crisis Group (ICG).
Their appointment suggests "the army has gained so much influence in government, it is going to start to dominate government, " said Abel Esterhuyse, a strategy professor at South Africa's Stellenbosch University.
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Mnangagwa, 75, was sworn in last Friday after the takeover, which the military said aimed at arresting "criminals" in government around the 93-year-old Mugabe.
"The bulk of members of the so called new cabinet is from the old guard," said University of Zimbabwe political scientist Eldred Masunungure.
"It is like recycling dead wood. Essentially, this is like putting old wine in new bottles," said opposition Movement for Democratic Change spokesman Obert Gutu.
However, Mnangagwa dropped figures aligned to a rival faction in the ruling ZANU-PF party who had backed Mugabe's 52-year-old wife Grace in a bid to replace her husband.
Analysts said Chinamasa's return gave hope of positive reforms to the moribund economy.
"We are likely to see economic reforms but very little on the political front," said Zimbabwean Brian Raftopoulos, who heads an advocacy group, the Solidarity Peace Trust.
Zimbabwean citizens interviewed by AFP said they found the new government's lineup to be uninspiring, even disastrous.
Many are yearning for a clean break from Mugabe's 37-year rule, which left the country with a crippled economy, high unemployment and emigration, and marred by allegations of rights abuses and election-rigging.
In his inaugural address last week Mnangagwa vowed to make sweeping changes in government and new policies to attract investment and revive the ailing economy.
But for some, the new cabinet line-up did not come as surprise.
They saw Mnangagwa, who is serving out the remaining months of Mugabe's term, as playing a longer game, surrounding himself with people who will help him win general elections that due by next August.
"The makeup of this cabinet does not reflect the sentiment expressed in his inaugural address in terms of a move towards inclusivity. This is certainly a negative indicator," said Pigou.
"Those who naively thought that a revolution took place will be disappointed by the reassertion of power by the military deep state and the attempt to re-establish unity within ZANU-PF, without representation for the youth or opposition politicians," said Hasnain Malik of the UK-based emerging and frontier markets investment bank Exotix Capital, in a note.
Incoming minister of information and a war veteran leader Chris Mutsvangwa, dismissed the criticism, saying the cabinet was balanced and Zimbabwe was not the first to appoint the military in government.
Mnangagwa "is trying to introduce new blood and to have some continuity," he said.
"People have to understand that some of the cabinet ministers were in the forefront of doing away with Mugabe," said the minister.
"Everyone appreciates the role of the military and there is nothing wrong in the president appointing people from the military who are patriotic, loyal and educated. It happens in many other countries, like in the United States," he said.
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