I added a feature to the downtime activity pages this morning. If you look at a downtime activity that your character can perform, you will see a projection of the number of days it will take him or her to perform the activity next to the production value (e.g., "(14 days for Thalenir Lestral)"). It's a minor thing, but I figured you guys might find it handy. Enjoy!
certainly one click less than having to queue something up to figure how much time it would take to finish a project. thanks :)