As a crafter, I find that I spend an inordinate amount of time just fussing with stacks. Among the worst "stack offenders" are the lack of forced zero mod 'n' stacking, and the lack of a forced "no HQ, Please" switch.

The 3456 number would go a long way toward improving bag slot efficiency; to wit, a switch that forces any stack you place in inventory, by any method, to be zero mod 3, zero mod 4, zero mod 5, and zero mod 6. Yep, all of them simultaneously. Certainly stack sizes below a certain minimum count would be excluded, but this creates stacks that are always evenly consumed by whatever mechanism, refining ores, weaving textiles, potioneering, etc. The result is that we have considerably less oneses, twosies, and threesies stack sizes which constantly cause the same bag slot consternation as stacks that are 99 deep. Some amount of further refinement of the definition starter I've included is obviously necessary, but you get the idea. A means of getting rid of a stack of one every time it appears would be a godsend; perhaps even a switch to dump it in the bucket.

This should especially be applied to max stack sizes sold in the MB. My word, why 99? A nice juicy 3456 number such 120 would be perfect. You buy it, refine it, or mill it, or forge it.. and all of it is consumed, leaving no extra oneses around to trip over.

Another godsend, give us a switch to say "create NO HQ PERIOD, PLEASE," thus forcing all outputs into one stack instead of two. I really can live with the loss of High Quality Table Salt.

Beyond that, other sorts of stack manipulation improvements would help.. here's one.. a switch that says 'never mind asking me how many to trade; just pick up the whole stack, damnit, and trade it! Free pancakes for life, for that one.

Shooter, signing off.. having just blown his stack. :P