Our court system is already constitutionally violatingly too slow (but we overlook it because who cares about the constitution nowadays) but yes lets change cases to have 15 judges that ought to be a workable solution. Or wait, we can have an appeals court (that normally has three judges hear an appeal) that though slow at least moves. I can't imagine if the courts were 15 times slower (because the judges were all on one case). I can't imagine every po-dunk jurisdiction that can barely justify 1 judge having 15.