We’re so disappointed to hear you lost a client, and certainly have a timeline feature on our product roadmap. If you have suggestions on how you’d like this to work, please feel free to share with the community so we can get a great discussion going.
I wonder how did Wikipedia, Facebook, CNN.com or pretty much any other source of information you use on a daily basis survive without timelines. Wouldn’t it be so much more engaging and interactive if Wikipedia articles were synced to narration, slowly faded in line-by-line and didn’t let you move to another page before the narration had stopped!
Having said that, the minds of pretty much everyone in T&D is so much anchored to the “narration + slides” paradigm that probably timeline should be on everyone’s list no matter how pointless and detrimental to learning outcomes.