Yes I have had this building for a couple of weeks now. i participate in the Guild Expeditions on a daily basis but so far i have NEVER uncovered a relic of any sort. I had thought there would be regular benefits. I am thinking that building the Temple of Relics was a total waste of time!If that is true from the wiki page, then this new GB is utterly useless.
It's way too large, drop rate is lousy and rare drop rate (the only one that matters) is beyond pathetic.