I would always opt to wait an additional year or more for any 70mm fare; just as long as it involves the perfection of a restoration and/or a transfer. Always, always, always.I believe I recall a similar situation with the blu ray of "LAWRENCE".
Sony almost went with the HD master and, made from the restored 65mm IP, decided to go all the way and do a full blown restoration from scratch (if you'll pardon the pun!).