automatic screen rotation comes in the next version (I'm currently testing it, works VERY well).
fullscreen won't come so soon, because the ovi store requires the programs to have a easy way to change programs. sygic would have to add a button for the dashboard where they have the zoom out buton. that is not that easy because they want to have the same program on all platforms.
the lag issue can be resolved. see my modding sygic thread.

nice review.
Thanks!