LOL!!
Ok for freeriding and DH the XTR was never intended. The where the New saint gruppo fits in. And it has all the right ingredients for an excellent set of parts for that application.

The new XTR type BB/Crank interface is ver very stiff and should be bloody strong. Also easy to service and Q factor is not an issue. It's actually the same as my Coda Taratula which is lower than a Deore LX.
The hubs are still cup and cone and thats far bettter for the kind of loads that free riders and DH 'ers exert on their components. Youdon't find cartridge bearing s in MotoX bikes do you? They're all cup and cone.

And Shimano hubs are dead easy to service. OK the freehubs do have a reputation of exploding although I've never had one break on any ofmy MTB's

I've had Hope Xc hubs and sold them and the spare set. Just required to much maiantenance to keep them running. If I add up the time for the miantenence and service bills at the LBS I would rather have just replaced the freehub each time.