Right now the queue is limited to 24 hours, which is fair enough, but it also relies on the player manually adding up the values to see what else could fit in there. Or (accidentally?) dumping out a skill at the end of the queue to make room.
For example, if an Alpha has 4 skills in the queue:
2hrs + 4hrs + 3 hrs + 10 hrs it means there’s enough room for a 5 hr skill to be added.
Easy calculation if it’s whole numbers, however, very rarely is that the case. 2h6m + 3h47m + 5h52m + 9h16m is a bit more complicated…
It would be useful to have a more accurate visual reading (e.g. mousing over the blue bar above the skill queue) to see this information.