setup a queue of costruction is easy , simply holding the "shift" button .
What if let cancel a building from queue of costructor always holding shift but moving on the (queue) costruction e click on it by right mouse button . maybe with an highlighted red color on the building in queue?
#cancel building from queue of costructor
storm hound
soft glen
Should be able remove building from queue, if u click on the building as if replacing it. Should be working as u described already. At least it does for queueing before match start hm
lament nexus
works in-match as well and doesn't even need to be the same building.
hold Shift, select any building, at least partially overlap the building you want to remove, and then left mouse click
you can also Press N to remove the first queue Order or spacebar-click to add to start of queue
nova dirge
There's a dev aversion to adding yet more UI elements.
As the above commenters pointed out, cancelling build options exists already.
A action queue in the style of The Sims is the only improvement I can think of, but my brain hurts just thinking of how to represent multiple build queues aggregated into a single queue not to mention the visual clutter.
This aspect of the game is likely to stay as is.