Service Templates and inheritance

I’m currently a bit confused about templates and inheritance is working.

For example:
Create a generic service template with no options set.
Create a service based on that template.
It is possible to override values like icon and notes in the service configuration, but it is not possible to override check interval for example.
Do need to create an additional template just to change check interval for one specific service?

Feature request for this case:

An no:
You could use Service Sets. There you still can modify the execution parameters for the single services