We were exploring the idea of "Cosmic Talismans", which are neutral and can go into any slot. The main issue holding that up is currently there is a limitation of only being able to display up to 3 set effects for talisman slots, so that prevents them from being anything other than stat boosts atm.
We'll continue to look at it and see what we can do without reworking the interface in the short term, but ideally we'd want to have these talismans provide a little more than just stats.
Thanks for the feedback and ideas though. They'll be taken into consideration with the continued development of that feature.
-Kaz