I will by trying your option 1 and see how it goes as a replacement for assigning multiple people to a single task.
Here are 2 examples of how my company could use multiple people assigned to one task:
A document needs to be read by the board before being signed by clients at the next meeting. This would allow the board of directors to all be attached to the task of reading the document, and their comments would all be in the same place, and have the ability to update/edit the document.
We also have some construction tasks for one of our projects, and usually who ever has free time will go and continue from where the last member left off. if they were all assigned to the same construction task, they could follow updates/comments by the last person who had time, and know exactly what needs to be done, and what has already been done, when they get to the construction site.
thanks for considering adding groups/multiple people to tasks, and for all the other work you guys put into this project.