Council chief executive Wayne Jack said the council was working on implementing a business improvement strategy that came out of the findings of the independent review.
"We're aware of it and it's just going to take a bit of time to turn around," Mr Jack said.
MTG director Douglas Lloyd Jenkins announced his resignation in August and will leave the job this month.
He will be replaced in February by Laura Vodanovich, who is director of Gisborne's Tairawhiti Museum.
The $18 million MTG opened in September last year.
It had a rocky first year with revelations the new facility did not have sufficient storage to house its entire collection as planned.
The council has set aside $629,000 to build a storage facility on land it owns in Onekawa to house artefacts unable to be stored at the MTG.
But Mr Jack said plans for the additional storage project would not be signed off until after they had been reviewed by Ms Vodanovich once she took over in the new year.
As well as 18 years' experience in the museum industry, Ms Vodanovich has qualifications in collection management.
"We'll wait for her to arrive and we'll make sure what we're doing is the right thing," Mr Jack said.