Of things that might be included if you were to remove it...? You could have items on which there were specific decisions not to include, such as, for example, a detailed penalty regime. If you were to remove the word “operational”, that could be included in the arbitrator's decision.
There's the notion of an embedded dispute resolute process, the request that an arbitrator have the ability to impose a sort of second-tier dispute resolution process to deal with issues arising in the implementation of an imposed agreement in terms of determining whether there has been a failure in service, in terms of imposing different consequences or compensation.
All of those could be deemed as being now available and within the purview of what could be included in an arbitrated agreement, and the policy decision had been not to increase the scope to that breadth.