The regulations came into effect just days after the MCG was given an unprecedented"poor"rating by the ICC for the 2017/18 Ashes Test,which was dominated by the batsmen and finished in a dull draw.
The Shield pitch went excessively the other way,with the MCC admitting curator Matt Page,under the club's direction,had pushed the boundaries too far.
"You want it to stay at the MCG but the simple fact is they've got to get the pitch right,"Lehmann said.
"The pitch has either been too flat and done nothing ...[or] this one did a fair bit and was dangerous. Somewhere in between they've got to get it right and get it right quickly."