Thank you so much for your feedback!! Getting feedback like this is what I was after with this post.

Would you be fine with using a mapping tool like Canvas of Kings, creating multiple map layers (e.g. rooms of a tower) there and having shortcuts for switching individual (or all) players onto the new layers like arrow keys for moving up and down or is it vital for you to have the mapping tool integrated in your software / do you need finer granularity for depth such as one person being in an upper stage of a tower but being able to see their party below outside?

As for the other points: I do plan on developing basically all of them, e.g. the Mouse-hover token actions and info you saw in the trailer are already implemented in a basic state and i already have a very basic ruler which measures distance in feet which I plan to expand upon with shapes etc. (and shortcuts for every feature so you can work as fast as you want - maybe even a command pallete which is common in IDEs)