Depends what you can do with these attributes?
For me the aim is to have at the end an csv export with 'group', 'user', 'ressource', 'hours', 'price'
allowing to calculate an invoice per workgroup and month.
Everything allowing to do that in a simple manner would be great. Our IT department has already adapted your version 2.0.1. in order to achieve that.
The disadvantage for me is that due to that adaptation I am not able to enjoy your updates, since the IT is understaffed and therefore not able to redo this for all your updates, too....