Freezing weed will just preserve it. I,v always wanted to get some fresh picked buds and then freeze them and allw to dry (It's possible for ice the evaporate it just takes a long time). Hopefully it would help the THC crystals on the bud to develope. And smitty, thats probably what happened to your half ounce if you didnt have it in and airtight container, it jst dried out even more.