The Windows agent service.discovery key/LLD is extremely convenient, but not all services are created equal; We need different kinds of item/trigger prototypes for different kinds of services, tied to application specific templates.

As service.discovery is an agent item with a static name, only one such item can exist per host/template, even though a different filter makes the item practically unique. The most simple approach would be to allow a parameter (which doesn't need to do anything) for the service.discovery item, thus the key would be different and everything would just work.