Ah, it should be apparent on a modern LCD as well as long as you use a real console (you'll get deinterlacing combing artifacts). Or maybe not considering it's not using the full 480 lines outputted by the systems interlaced mode, but is still just rendering 240 lines of graphics?
But yeah the result is that the game isn't as sharp and nice looking on real hardware as it could be, it's actually the first interlaced game I've seen that didn't have it as an extra ram expansion mode.
Appreciate looking into it, interlaced is a bit of an eyesore depending on how close you sit, and you don't get scanlines that way either.