retaining as much oil in the sump as possible at all times is a worthwhile goal, however, that retained oil will be pumped through the system, but it then needs to be able to return to the sump.
if it collects in the forward part of the pan due to to the degree of nose down attitude, [with a rear sump] it will need a way to be able to return to the sump and pickup.
this may be an extreme example, but possibly worth noting ?