Add a half or a whole teaspoon of blackstrap molasses to your feed before the grow. It'll lower your pH, make sure to check it.
A little bit of sweet brings out the other more complex notes a lot better.
@Jeff123fish may be right as well. Light and heat will rid your bud of terpenes.
I am not familiar with this auto but many of the older auto strains were made for outdoor guerilla grow and this may have some of that in its lineage; some sptrains are low smell on purpose.