I would like to borrow some simpler syntax from Python:

"if (a)", "for (...)" -> "if a", "for ..."

"if ((a > b) && (c > d))" -> "if a > b and c > d" (yes, I know C++ supports "and" if you wish)

Or how about accepting a new-line as a ; at the end of a statement (ie: optional ; at line end)

I also love nested tuple unpacking: "for i, (key, value) in enumerate(dict.items())"