Extra water will form too many ice crystals. Pack, using dry or tray pack methods. Directions for microwave-blanching of vegetables are not based on any published research. Recent research indicates some of these times are not sufficient to adequately blanch some vegetables. Inadequate blanching does not cause a food safety problem, but quality may suffer.
Water is a more reliable method of blanching.
You can use a pressure saucepan or microwave oven for cooking frozen vegetables. Follow manufacturer's directions for cooking time. A pack should be thawed enough to break it up before pressure cooking. If cooking vegetables in a freezer pouch in the microwave oven, be sure to split the package open first. Freezing Fruits and Vegetables.