We don't aim to change that. That mechanic is something that does fit the nature of the FSS. However this is not the nature of our request. We are talking about exploration solely. Not missions.
I'm still thinking that You do not have the clearest picture of the nature of the request of this thread. We don't want to change existing FSS mechanics.
Only to introduce the system map reveal in such a way that it would be optional.
Previously You didn't use the system map to locate assassination mission's target.
That's just me and faded glory nattering about how we scan. Nobody (I think ) is worried about FSS functionality being removed.
The reason they added the FSS as a standard ship feature was to prevent people way out in the black being stranded without now needed exploration equipment. Removal of the FSS would fall into the same already avoided trap for explorers who set off after the upgrade and have filled the spare slot with something else, its not something people should realistically worry about IMO.