XIM and similar tools are grey market - they do not care for compliance, nor do they mind breaking the terms of service to work. Thats the entire fucking point. They are workarounds for people wanting to either cheat or who want to hack their device for greater freedom of input.
These people will.be unhindered by this change, because XIM has an excellent history of spoofing a controllers input to the console. The people who will really miss out are the younger or poorer people who will have cheaper 3rd party controllers or unofficial adapters. Less freedom for the user. More money for corpos.
Sometimes I wonder if this is hackernews or corponews