Special Resource buildup
When certain special resources such as Dragon points, Amulets, Adamantine, Emeralds, and Soulstones build up without anything to spend on....or anything a player finds useful (very subjective to the player's personal style of play), I think it would be a good thing to be able to apply these points to Art Discovery times....Lost Arts, SW Arts, and Stoneheart Arts. Construction times and unit training times could be useful as well, though I find the Art times the most in need.
Currently, universal boosts and sapphires may be used to boost the discovery of an Art.
When a player clicks on the boost screen of an Art that is being 'researched'...whether discovery or upgrade....there should be several instant boost options. Based on the time left, not just the number of sapphires needed, but the number of Dragon points needed, the number of Amulets needed, the number of Emeralds needed, the amount of Adamantine needed, and/or the number of soulstones needed.
I hope I was clear in what I was trying to suggest.