I see, ideally, we'd want the game to run @ 1080p on high settings at least at a stable 30 FPS with such a setup. Since Unity (the game engine we use) currently also does a lot of work on optimization, I'm hopeful we can get closer to that goal in the coming months.
But we're very excited to hear you've enjoyed this preview and hope you'll stay tuned for the next updates! If you'd like, you could also drop in on our forums for more feedback & discussion on ideas for features, improvements, etc. Cheers!