Hello Sebastian Talamoni,
You are correct. Project Completion is calculated based on story count. That being said, I agree with you that it should be weighted by estimate or at least have that as an option. Some project management methodologies (like Kanban) suggest that every work item should be the same size (estimate), but it is unlikely that every Story would be the same size in any scenario.
I have added a feature to our backlog stating that we should provide both a Project Completion Chart based on Count and one based on Estimate or we should give the option to choose what chart the user wants to see.
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