The issue with aluminium axles is not strength but the reduced space for bearings. The ball bearings are smaller than used on steel-axle hubs. There seem to be more freewheel failures, eg cracked shells. Have they reduced the shell thickness?
If you are looking for a premium touring hub and you have the money, then Phil Woods is the obvious choice. The spares support is a lot better than for Shimano in the long run.