Many people are now starting to whine about devaluing their land investments in SL, again. They always tend to do that, e.g. when LL adds land too fast, lowers tier feeds, upfront fees and does other stuff.
Just get one thing into your big skull: owning land in Second Life is not about getting a value. Land is made by the Lindens, as they see fit, you are on their whim there, always, and there is nothing yet to change this. Take it or leave it, but don't always whine about that. Real estate owners with a good business approach should know better than that.