Zvika – I suggest you read the article on the MK’s website (linked above) re: the Bi’ur issue – they note that as the wine was not ready then, it was still in the hands of the Otzar Beis Din at the zman bi’ur, which is considered to be in the hands of the public – so as it was not in the possession of any one individual then, there was no need for bi’ur. The MK article also address the other issues you mention.
Also, you are dead wrong on the treatment of something that was chayav in bi’ur and it wasn’t done. it CAN NOT be spilled out or otherwise destroyed, as it’s still Kedushas Shvi’is, but it also can not be used. It has to be put aside until it spoils on its own, and can only then be disposed of. As it relates to wine in sealed bottles, this is a problem, as the wine will generally not spoil for decades or longer if left alone – so the individual has to leave it on its own essentially forever…
an Israeli Yid