First all thank you for making such a awesome apps.
As it is extremely useful in tracking projects and work progress, it would be even better to allow to users write and edit in groups.
For now I see you guys tried to give the share with an export but that is still far away from convenience. The one major reason why google drive and Evernote dominates is probably the collaborated editing feature, which not only allows better working environment,but also greatly boost promotion and marketing.
If you guys could do so, I am sure the rate and credibility ot Agenda will be up another level, and further income could be made by subscription scheme too, as it is very reasonable to collect to run the server.