Thanks for the idea.
With last beta http://beta.plantuml.net/plantuml.jar you can now have :
[foo] lasts 21 days
[foo] is 40% completed
[bar] lasts 30 days and is 10% complete
This has not been widely tested, so feedback is welcome !
Is this the expected behaviour?
No, it's a issue :-)
Could you post here a very short example that shows this issue. Thanks!
Here is an example :