I, personally, think the queue is one of the best things that KoLmafia offers. Hola implemented it for me, after I suggested it, and we did a lot of back and forth debugging to get it work the way it does now. I think it's brilliant. We have since refined it to track resources like adventures, Meat, stills, tome summons, but the idea and implementation was all hola's.
Lack of that capability is one of the main thing that cripples me when I try to play KoL in a raw browser. I COULD do all the ingredient tracking without the help of my computer, but I'd need to use a pad of paper and a table of adventure and stat yields for all the recipes, and fiddle for a long time in order to achieve the diet I get now in seconds using the ingredients I have on hand with KoLmafia and the concoction queues.
Maybe it's a hardcore thing. I know that lost, for example - a softcore player - doesn't use it. He probably just has his list of pulls planned out and KNOWS what he will be eating and drinking each day. In Hardcore, I depend on what I find and what cocktail mixers I summon, for example, to decide what I CAN make each day.