The title of this task is quoting http://doc.qt.io/qt-5/signalsandslots-syntaxes.html

It seems that there is no much difference in complexity now when we have the helper function, which was introduced in Qt 5.7 - https://doc.qt.io/qt-5/qtglobal.html#qOverload

We even have an example of using qOverload at the bottom of that page. And it does not look much more complex than using macro/string based connections.