Assuming the Liberals care about losing voters in droves. The Ignatieff strategy seems essentially to be to let the Harper Tories hang themselves by letting them rule as they wished. This campaign worked to the extent that it set in motion the force that got the NDP into the position as official opposition.
But, on the key economic points there is not much that seperates that Liberals from the Tories, so in a material sense they don't have much incentive to do much other than wait for better weather, or the son of a nationally known and popular prime minister to take the helm.