I had a go at using Learning Designer. There were no instructions on how to use the designer but I spent half an hour looking at open designs and playing with the tool. I don't think I quite got the teacher interaction correct as in the final version it shows the teacher absent from the webinar during the discussion and Q & A sessions which is a mistake.
I used an online learning activity from a project that I am managing. I didn't create the online learning activity but participated in it. The learning module was about using video 4 learning and assumed no prior knowledge. The module included a webinar, resource bank and 5 activities to choose from. The module was designed for self guided learning with no tutor interaction after the initial webinar.
The Learning Designer was good at capturing the different kinds of activities and the graphical representation allowed me to see quickly the variety of activity included in the session. The main disadvantages were the time it took to use the designer and that the model didn't allow for learner choice, it assumed learners would do all activities in deriving the time required for the learning module.
As the designer suggests the webinar was mostly about listening, with two Q & A sessions, in retrospect it would have been very easy to have added a poll to collect prior knowledge and perhaps a couple of very short video clips for participants to have commented on either via the chat box or another poll type activity making the session more interactive.
The other feature of the Learning Designer is it's shareable content. Designs can be shared and adapted although the interface for this looks like it is still in development. In the long run there is potential to save a considerable amount of time, particularly if the resource links are included and the resources are also adaptable.
My design is at: http://v.gd/nUA8xv a word version is also attached