Apart from my wall of text, having said that a Task cannot stay in multiple Milestones from the same project, so on the Workboard you never see duplicates, this is the current blocking:

To be honest this could create a performance issue in my installation, since I use Sub-Projects as a simple way to collect many Projects that must be grouped but that have different features.

Interesting question.

I don't personally have much insight into the "board" functionality, because I've never used boards in any setup other then as a simple table, and none of the workflows that involve moving small pieces of paper around make sense to me.

I think a tooltip would clear up some of the confusion around the numbers and what they mean. However, I think the issue described here is less about how confusing it is, and more about how the UX expectation is typically centered around count rather than points. For example, which has the denominator, turns the UI red, etc. So, a good idea! I just think it's separate. :)

By "tooltip" do you mean something that activates when hovering with a mouse?

In T15100#5480, @avivey wrote:

@MBinder_WMF - how much of this will be solved if we just add a tooltip to the [ X | Y / Z ] header?

@MBinder_WMF - how much of this will be solved if we just add a tooltip to the [ X | Y / Z ] header?

I think we can remove the Discussion Needed Tag since at the moment we just need to clarify a bit the feature, before being able to discuss it with more people

Ihihih OK my friend

I agree. Having said that I'm not bold enough to propose a "default: open in same tab" since at the moment we have the exact contrary. That is why I proposed this compromise based on the destination.