It seems that some authors really bash concentrates. You can make excellent wine from concentrate. By taking a few of these steps will greatly improve the results of any concentrate wine. Use distilled water.
Water is all that is removed from concentrate.
Do not add any other flavors you may not want from the water that you add. Use appropriate yeast. Use the correct yeast for the wine you are making. Wyeast offers a full range of yeast including malo-lactic cultures. The starter is easy to make and it is a laboratory pure strain.