There's been a few similar request but none that i saw to my suggestion.I suggest that there should be an option to have the SLA automatically changed based on  the status that is selected. A two week project doesnt need a 2hour SLA but the initial response or open status should have 2hour SLA to at least be addressed. Once or if we find out it the ticket is a project for example, and we change the status to project or something else the SLA should  change as well based on that status. The SLA should probably have the option to change  as well based on a response. If we setup a 4HR SLA for the initial response if someone responds to that ticket the SLA should now have the option to automatically changed based on a Resolution SLA or something of that sort. Or even have the status automatically change on the initial response and again the SLA would be based on the status.