It would be nice if Symbol.toString() returned the string representation of the symbol internal identifier, instead of returning the string "Symbol"....
Okay, we've updated the way this works: on release builds the string "symbol (<sym>)" will be returned, where <sym> is the integer value of the symbol. On development builds, a string of the actual symbol name shouldbe returned. This fix is already available in the 2.3.0 beta SDK release.