Don't worry, every major browser had implemented EME for over a year before the W3C even considered adding it to the standard, and it has had zero impact on security researchers this entire time. Adding it to the standard is simply formalizing what has already been implemented for some time, it doesn't change anything.
Adding it to the standard is simply formalizing something that has been around since 2013. EME and the W3C standard contains ZERO DRM, there isn't any DRM in the standard nor in EME. EME is a secure way of discovering and connecting to third party DRM CDMs (content decryption modules). It is moving the access point from insecure plugins with system wide access to the secure video tag which can be sandboxed, which dramatically improves user privacy and security. Seriously there isn't any DRM in the proposed standard, not a single line, not even one character of DRM code. All DRM code remains outside the standard as it always has been.