There is not, I did not personally know VOT nor do I have any reason to suspect they have passed away. As far as I know they were just a personal friend of Jestex who is no longer a part of the community.
There has been no announcement or news about crossplay, though there's a chance it may come at a later time.
There are no plans to port tModloader, and I don't think there ever will be due to most Console policies on mods.
This is correct functionality - on lower end devices they cannot manage to keep up with the full amount of frames per second - turning frame skip on means that the frames it cannot draw are discarded. Turning it off like you have, forces all frames to be drawn, but this takes longer than the...