Yep. Just learning to navigate effectively is time consuming, sadly. There's not a lot that can be done about that as it comes with any complex, versatile tool. I wish they had some more physical modelling options though, like physical 'bricks' you can attach similar to LBP. It'd make it a lot more beginner friendly if you could grab a block and push it against another block for it to stick. Modelling and physics are decoupled which is something of a limitation of the engine, bit I don't see why MM can't have a 'primitives' mode where you fetch a primitive with its collision geometry active and apply it in the world, and it can be automatically joined or grouped or whatever to make a composite physics object.
And I wish they could smooth out the Move camera controls, especially to lock roll so the horizon is always horizontal. Navigation with Moves is versatile and intuitive but shaky and wonky, and it's very hard to use it with regular shapes. Most Dreamers appear to prefer DS for grid-aligned work, but that's a whole second interface to learn and doesn't play nice with the two active at once.