I didn't see this but I have to believe someone has already asked for it. Being able to rearrange your build queue would be great. I often have ~10 things queued up but all of a sudden need a settler; if I could queue up a settler and promote it to the front of the queue, that would work fine in lieu of a complete drag and drop queue reordering UI.

Also, a more compact view of just the name of what is queued, in a vertical style, would be an improvement over the giant figure/picture horizontal queue. Maybe a standard/advanced radio button there, and standard is the current queue and advanced is a compact text only vertical?