Suggestion: A warning indicator for "impossible" movement commands
The thing that makes creep block (or trying to position yourself near walls) the (sometimes gamechanging) annoyance that it is, is that you often don't notice your champion can't directly reach their destination. It'd be nice to have some sort of indicator other than your minimap that tells you, "hey, I'm gonna hafta move around that". Something like the screen or the cursor changing color briefly.