Not sure if this has already been suggested or is much of a problem for people with larger energy/mood tanks, but I've noticed while quoin jumping, especially in the ancestral lands, that my tanks fill up quickly and I'll end up accidentally collecting energy and mood quoins I don't need. Then I have wasted quoins counting against my quoin multiplier and can't collect as many iMG and current quoins.
There are two solutions I thought of: either Glitches cannot pick up energy and mood quoins if their tanks are full, or excess energy and mood could be turned into iMG. This would work in two ways; say you need 20 mood, but you pick up a 30 mood quoin. The extra 10 mood will turn into 5 iMG. If you have full mood but accidentally pick up a 30 mood quoin, you receive 15 iMG. By having a two-to-one conversion, Glitches aren't wasting quoins when they accidentally pick up quoins they don't need, but without essentially turning mood and energy quoins into iMG quoins.
These solutions could also be combined, ie, when you pick up a 70 energy quoin but only need 10 energy, you would receive 30 iMG, and then you would be unable to pick up energy quoins until you lose energy again. It could also be applied to foods and drinks (but not to energy and mood rewards for completing quests and achievements).
Not something totally necessary or revolutionary, but at any rate, it'd be another sweet way to rack up extra iMG and make the quoin system more efficient/rewarding!