I have numbered your commands and updated description to be able to refer to them.
FRICTION POINT 1: From 2.6, when user tries to add model, we tell them that they need to get additional grants from controller admin:
$ juju add-model trial
ERROR you do not have add-model access to any clouds on this controller.
Please ask the controller administrator to grant you add-model permission
for a particular cloud to which you want to add a model.
I have numbered your commands and updated description to be able to refer to them.
FRICTION POINT 1: From 2.6, when user tries to add model, we tell them that they need to get additional grants from controller admin:
$ juju add-model trial
ERROR you do not have add-model access to any clouds on this controller.
Please ask the controller administrator to grant you add-model permission
for a particular cloud to which you want to add a model.