To be fair, the tutorial does explain the R vs Alt-R thing, but for people used to normal WASD-controls in games I agree it's a bit clunky.
I like the complexity, personally, but some things should be tweaked slightly to accomodate players like yourself who struggle with it, and to improve the experience for those who don't, as well. Even I don't use the default; I rebound 'ALT' mode from Left Alt to K (one of my mouse's 24 side buttons), among other things.