With 2012 and 2014 in memory, it sounds here like all priority will be switched to reliability and keeping it steady for LM now - as it should
http://www.24h-lemans.com/en/news/ni...746_24768.html
ByKolles probably will catch them in speed a little bit then (if the "innovations" work), but that hardly matters if they'll still plunder with engine/suspension/brakes/whatever.
Don't think Rebellion will be doing any testing prior Test Day though? I mean they did get fourth in 2014 by basically running absolutely nothing prior Test Day too, except single shakedown at Paul Ricard, but they still had Toyota and Michelins then even if the Oreca chassis had never run anywhere.
It'll be the best chance yet anyway.