There are quite a number of our members, & an awfull lot who are not members who have tested the A14/15 bottom ends to the limit using cranks that are not cross drilled & these engines have not been found to be wanting.

The reliability of A series Datsun bottom ends is legendary, to the point that, for many people, they will swear that as long as there is oil in the sump, you can't kill it.

As for being 'quick to rev', I think that, in stock trim, the torque from the half inch [12mm] stroke increase in the A15 will cancel out any problems there,
In race use, the A14/15 doesn't take a back seat to its shorter stroke brothers & many have come back from a 10,000 rpm wring-out to live & tell the tale. [then again, a few didn't. LOL]