Hi Chrome! Well, you're talking about two entirely different planes, the He119 was an extremely refined high speed bomber, while the Ju 52 was a lumbering tin box. No relation at all, exactly the same thing as a Ford Trimotor on a low wing. The Tante Ju was a very unsophisticated plane, really a corrugated crate with wings. I once took a joy ride in one some 30 years ago and more lumbring than that only the An-2
Perhaps you could gain something with dropping the nose engine and putting in better engines on the wings if these could be made available, for example the Italians did that with the SM-79. I suppose using a too sophisticated and complicated engine set-up would make the machine awfully problem prone and expensive, therefore no useful numbers would be built.
If the bomber planes had so little priority, imagine the poor transport fleet.