It really is old school
"Raven Strike" was marketed as a return to the Ghost Recon series' roots, and it doesn't disappoint in that regard. During the first mission, some trivial plot detail strips the Ghosts of all their futuristic toys; no more sensor grenades, UAV drones, cloaks, or fancy goggles.
It's a misty romp through a twilight swamp, and you'll have to rely on your unassisted senses to get you through it. If you're the kind of gamer who moans about too much hand-holding, you'll love this mission, as it strips away everything that made you feel like an overpowered badass in the rest of the campaign.
The other two missions give your gadgets back, but still carry a hint of old school design in their pacing and structuring. In a good way, of course.