First of all, amazing work on the Slider Element beta – absolutely incredible.
This request is not at all meant to take away from all the hard work that has gone into perfecting the latest release but I’d love to get it on your radar for (perhaps) some consideration.
I’ve had a couple of use-cases lately where an off-canvas drawer from the bottom would be ideal for mobile. In fact, given a few of the recent updates, I think Pro is a solid solution for simple (perhaps even not-so-simple) web apps.
Literally just a bottom-up carbon copy of the current off-canvas element would be perfect. Something like: