I was thinking that it may also be worth asking the European Commission to start another investigation against Apple's monopoly abuse dealing with the configuration of iOS, which allows to install only apps downloaded from Apple's App Store.
I think the chances of Apple violating EU free-trade legislation are not slim and, needless to say, limiting the app dictatorship of Apple's Store would also be advantageous for those independent developers selling applications for the Mac.
I would very much like to know if you have any pieces of advice about the most important points to include in the complaint letter.
Thanks.