While Wiz has stated that he won't drop two of the three FTL types in order to fix their problems, I think it could be worth looking at an espionage system before committing to too much change with this.
Simply put - the problem with FTL right now comes with both the difficulty in anticipating fleet movements during warfare and, particularly for hyper lanes, getting blocked off from movement.
The latter won't be solved by introducing spying, but the former might. One facet of an espionage system could be when deciding to gather intelligence from another empire, you could pick one of the options you'd see in the trade window (such as a research agreement or mineral request) and essentially create a 'one-sided' deal (the mechanics of which I'd leave to better thinkers than I)
If you could then make on of these 'sensor data', then you'd be able to see a potential enemies ship details - in other words you'd know where their ships are, what type of FTL they are using and from there better anticipate how they would likely attack your civilisation.
Knowing what the potential range of enemy fleets and what type ahead of time can allow you to better fortify star systems and know the limits of where a rival empire could plot an attack.
Of course, this isn't the be all and end all of an espionage system, I still think that being able create factions in other empires to rebel or alter another's ethics would be cool, as well as captured spies being used against you for info, or to divest info from your empire would also be interesting and exist within current mechanics.
Simply put - the problem with FTL right now comes with both the difficulty in anticipating fleet movements during warfare and, particularly for hyper lanes, getting blocked off from movement.
The latter won't be solved by introducing spying, but the former might. One facet of an espionage system could be when deciding to gather intelligence from another empire, you could pick one of the options you'd see in the trade window (such as a research agreement or mineral request) and essentially create a 'one-sided' deal (the mechanics of which I'd leave to better thinkers than I)
If you could then make on of these 'sensor data', then you'd be able to see a potential enemies ship details - in other words you'd know where their ships are, what type of FTL they are using and from there better anticipate how they would likely attack your civilisation.
Knowing what the potential range of enemy fleets and what type ahead of time can allow you to better fortify star systems and know the limits of where a rival empire could plot an attack.
Of course, this isn't the be all and end all of an espionage system, I still think that being able create factions in other empires to rebel or alter another's ethics would be cool, as well as captured spies being used against you for info, or to divest info from your empire would also be interesting and exist within current mechanics.