I think the "grunts" concept gets back to the origins of the troop builder 4-pack concept. There's been a good 4 sets within the past year+ that have had named characters that a good number of people thought should have been released on their own cardback.
I'm curious to see how they execute this. Will the pilots just be in the orange flightsuits? Or will there be a mix, incorporating the blue flightsuits that were seen in ROGUE ONE? But then the photo that was used in the pipeline reveal has the pilots wearing their cold weather / snowspeeder pilot gear. Because we all love to nitpick!