I own a 2015 Legacy and have been very pleased with it. Have about 5k miles but last week we went through our first significant rain with it. The storage compartments are soaking wet and the compartment with the water tank had about an inch of water in it.
I found a post where you stated "There are some manufacturing issues that I have posted previously about (water in my rig basement that is a manufacture defect--but it is getting fixed)."
I could not find the orginal post you mention. Can you elaborate on your issues and what is being done to fix it?