Thanks for your attention to the project!
Currently, I don’t have any ETA for Panthera 2.0. I’m investing a lot of time in R&D to make it as good as I want, including a fully adaptive UI. The progress is really good! However, this progress depends on my free time, so I can’t commit to any specific date.
I will continue to post my devlog on Twitter, and one day it will be ready to do amazing things. 
Regarding exporting to GIF/MP4, it seems to be a tricky task in Defold. The current solution is to make the editor view fullscreen and record the animation. However, in this case, there is no alpha channel. So, we may figure out how to do this later.