Migration from LTI 1.0 to LTI 1.3

I would also like to see some more technical information in regards to this. Probably an implmentation guide, the security model sounds promising but requires more details about the implmentation plan.

The LTI v1.3 and the IMS Security Framework specification documents will be published to IMS members as a Candidate Final draft this week (available here: https://www.imsglobal.org/activity/learning-tools-interoperability#LTImember). Now that these specs, along with the Assignment and Grades Services, Names and Role Provisioning Services, and Deep Linking (to be published in the next week or two) -- comprising the LTI Advantage program -- are in Candidate Final draft, the LTI Workgroup is working on additional documentation to offer implementation and migration guidance. These documents and other developer resources will be published as soon as they're available.

We have found that the JWT security model is challenging lift. I don't think it is the specification, rather the lack of great libraries and example code in multiple languages. 

I think these are good moves, but the lack of the JWT libraries/example code and the move to Oauth2 creates a barrier to entry large enough that I don't think adoption will be high unless LMS platforms begin to depreciate older versions of LTI.