Supreme Court's holding that the residual clause of ACCA was unconstitutionally vague did not announce a new constitutional rule that would justify the appeal of sentences under any compulsory residual sentencing scheme; this is established in part by the subsequent holding of the Court that advisory residual sentencing schemes are not unconstitutionally vague. Circuit split flagged.
http://www2.ca3.uscourts.gov/opinarch/172906p.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.