SM
Bigfooty Legend
They have 2 episodes left, and it's possible that a lot of answers will be provided - once we finally discover Ruby's origin story.
I don't think we'll ever get an explanation for Old Ruby's ability to teleport herself, or Rogue's ability to push her out of the teleporter triangle while her feet were effectively glued to the ground... and that's both disappointing and sloppy writing.
I don't think those things ultimately matter as much as you think they do though. I'm sure there's plenty of examples over previous seasons of things that never got fully explained but in the fulness of time ultimately didn't particularly matter. The fact the snow keeps seeping through I think is a hint that some of this stuff will be explained though.