AOP implemented by the Plugins in Magento2 a good framework feature.
Currently, these AOP overrides work on the basis of one class at a time. What could be a great addition to this, is to have Spring (Java) like 'Pointcut patterns'. Pointcut patterns will make it possible to inject 'before', 'after' and 'around' to multiple functions and classes through a single statement. It will make plugin definitions more powerful and efficient. Would be great for something like logging.
Sample - http://docs.spring.io/spring/docs/current/spring-framework-reference/html/aop.html
If this makes sense to you guys, I'm open to contributing. Will be great to hear your thoughts!