The new Classic CRF Model 70 is a safer design than the Pre-64 with better overpressure gas venting. The parts are also cut with CNC machines to better match the specifications. That means no hand fitting is required. Trouble is there is no hand fitting on the new CRF M70's. There was plenty on the Pre-64 Model 70's. So much so that they function as intended as much as 87 years later.
Now the bad...
The magazine springs of the new Classic M70's can break. No problem, just replace that modern marvel with a surplus M98 Mauser spring.
Secondly, the extractors can break. Ask any gunsmith with 40 years experience how many Classic extractors they've replaced? Chances are a few. Then ask how many Pre-64 M70, M98, and P14/17 extractors they have replaced. Bet it is zero! The Classic extractors can however be upgraded to Pre-64 or even P14/17 and maybe a M98 extractor by a reasonably competent gunsmith.
I have both Pre-64 and new CRF Classic M70's. With a couple old, never do they break parts, and a few hours of carefully smoothing out the actions, the new Classics can function as good and be as reliable as a Pre-64.