Earlier quoted context omitted.
Why wouldn't they have used their strongest applicable patents? They may have more similar ones and maybe one or two will hold up but do you really think if they had some powerful non-FRAND ones they wouldn't have used them on Apple or Mircrosoft by now?
We didn't use nukes in Vietnam. The value of the Motorola's patents may be in keeping Apple and Microsoft from using their strongest patents.
I just don't see the scenario were you can't do a licensing deal with your opponent but you agree to use you second rank patents in the lawsuit.