I would like to see this.
When I go to Manage Email Queues and select a queues at the bottom it would show me all Parser Rules that where applied specifically to this queue with the rules "destination mail queue" and also show general overall rules that would affect this queue. So separate in Parser rules for this queue specifically and general rules.
Then at the Insert mail parser rules add a 1-st option to select General rule or rule for specific queue. When specific queue is selected give pulldown menu to select the queue and then auto fill in the first rule for the qeue.
for example pulldown to
support@randomsolutions.nl auto fill's in
Destination Mail queue --> Equals -->
support@randomsolutions.nland then the other rules can be set by the admin. This rule would then also automatically show up at the buttom of the queue in the Manage Email queues section.
this would make everything much easier to drill down to.