Blackboard, iPad and Storyline Compatability Questions

Forgive me if this question is half discussion, half question but I have some technical isues with Storyline I need some assistance with. We have just bought one seat of storyline and are in pre-production phase and considering more copies or whether we should look at other alternatives.

Our current LMS is Blackboard which requires a student to log into. I understand that the iPad app for Storyline cannot play content from an LMS unless the Tin Can API is used with authentication enabled (something that Blackboard does not curently support). There was a 2 year old thread about this and I am just confirming this is still the case as it seems there is an impasse between Blackboard and Storyline that has not been resolved. Are there any plans to address this issue? (I understand that storyline line content can be hosted on an unsecure server and then launched from an LMS page link but this is not an option for us).

Secondly I have been experimenting with the safari HTML5 support on iPad which does seem to work for the video content we have created thus far. I am wondering what the limitations of this approach are, instead of using the Articulate Storyline iPad app. I have looked at the current article https://en-uk.articulate.com/products/viewing-articulate-content-on-ipad.php  but the information here is vague, I would be interested in specific examples of where the HTML5 player has deficiencies.

Lastly Retina devices are becoming the norm these days. From what I understand Storyline has no option to output for retina devices, unless 2 storyline files are made at different resolutions, but I guess that would also require some coding to have the browser detect retina support and load the correct images. Are there any plans to add retina support to Storyline? I would also be interested in workaround solutions that people have implemented.

If anyone could address these specific questions and add any discussion or workarounds that would be great. We are very wary of moving forward with a solution that is not responsive and does not run well on iPad devices with our current LMS Blackboard. Although not specific to Storyline we have also looked into iSpring Presenter which also has HTML5 support, so if anyone has any experience with that software on iPads I would also value input. Cheers.