Idols/Libram/Totems from past content should be able to be purchased through undermine vendor. Or at least relevant ones. Seems impossible to solo atal raid and even more impossible to find a group doing it. At this point my druids never going to obtain its current bis idol from atal. Would love for this to change 
If you want the Blizzard staff involved with SoD to see your suggestion, you need to post it in the appropriate forum:
Best of luck in your games !
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