Just piling on. We have had the same experience with dramatically reduced outgoing voice quality and a significant increase in dropped calls. We are dropped multiple times a day, to the point that we won't use the Obi for 'important' calls and instead use our cell phones... and we're in the basement of our building, so that should give you an idea of how desperate we are.
What, if anything, is needed to help resolve these latest issues that seem to be highly correlated to the latest firmware (the one that, ironically, prevents rollbacks)?