I don't believe that you can blame this decision on IDCC's legal team. Essentially you have 4 parties to consider: one is the collective infringers, then the staff attorney, the judge and IDCC.
The decision maker is the ALJ. The decision is subjective and is made upon a combination of factors: facts, case law, legal verbiage...but unfortunately behind each contributing party is a human...yes including the judge that can be swayed by emotion, misrepresentation of certain facts, misunderstanding of certain technologies and associated facts.....also there are external pressures such as his preparedness to make a decision that would lead to an import ban of major players in the industry that have tight business relationships with other major players in the industry. There is also the unspoken other pressure that may have contributed that can always be speculated on.