When I first read this, I hated the idea. But the more I think about this, the more I think it makes perfect sense. In no particular order:
Combat Recons are literally the only ship in the game with D-Scan immunity. As such, it leaves them in kind of a lurch. Sure it’s a powerful trait, but you can only use it to the full extent if you’re only flying combat recons, which definitely limits your options. Having a set of frigate counterparts for combat recons would be incredibly useful for recon gangs.
As others have pointed out, Combat 'Ceptors have been neglected since they lost their bubble immunity. Right now, they’re just faster, lower DPS variants of Assault Frigates without anywhere near the tank.
Combat 'Ceptors “…utilize a combination of advanced alloys and electronics to reduce their effective signature radius.” (Straight from the description.) If that’s not fitting of a D-Scan immunity bonus, I don’t know what is.
I do have some concern about small FW plexes. A gang of D-Scan immune Combat 'Ceptors would make for an incredibly powerful plex trap.
Overall, I’m on board with the idea, but I also don’t like the idea of getting something for nothing, so I’d like to amend the proposal to be the following:
Grant Combat 'Ceptors D-Scan Immunity
Decrease their base warp speed to 6.6 AU/s
This would further differentiate them from Fleet 'Ceptors, keep them more in-line with Combat Recons (exactly double their base warp speed), and reign in the mobility of large groups of combat frigates that don’t show up on D-Scan. Fleet 'Ceptors would be the “chase things down through hell or high water” interceptor, and Combat 'Ceptors would be the “catch you in a trap you never saw coming” interceptor.