The bypass signal getting robbed of its tone could have something to do with what A/C connector you use on it. I hear Boss makes the power supply fucked up because they want you to buy their power adapters and only their power adapters, so if you use a OneSpot, that could be muddling it.
I know that probably isn't the case, since Boss makes some pretty shitty pedals and this could be no exception, but it could have something to do with it. I have a DD-7 and I love it, so I'd hate to see you give up a good pedal just because of a simple hardware issue.
edit: Wait, fuck it, get the clone, for the love of Jesus, get the clone.