I'm actually annoyed by the ill-defined, uncustomizable behavior of the engine when the screen size changes. There's no reason to force rendering on a fixed-size canvas to up- or down-scale. I believe GM allowed options to scale or render at (0, 0), which is stupid; why can't we center it? Why can't we allow users to let the card scale the textures and draw the lines as normal? Why can't we offer threshold scaling, eg, take the largest fitting of .5x, 1x, 2x, 3x..., then render it centered? Why not just let the user define the render logic around the drawing size? There are a lot of modes that make sense.
Handling view boundaries for users complicates this, because we logically need to be in charge of that until the user manually assigns to the view variables, which we don't facilitate. So we have the classic UI problem of "how do we scale these widgets?" (here, views). Once we've scaled to get accurate view coordinates, we then have the problem of how we want to project the world onto this space. GM's answer is surfaces; ENIGMA originally let the user handle that, but now, as I understand, also uses surfaces. It's annoying.
Anyway, that concludes my rant. The short version is, I don't have an answer for you because the current answer is ill-specified and generally lousy. Sorry.