I’m not sure why you’re comparing an air-to-air missile with air-to-ground or recon/surveillance drones?
As a technology demonstrator, they demonstrated that the drones could be deployed and organized. Upon release, they swarmed the target in a circular fashion (like Injuns circling a wagon train).
Of course, the “risk” to the F/A-18 mitigates the benefit of the drones, but we’ve seen other delivery systems (MLRS, ATACMS, etc.) capable of delivering similar submunitions in a very cost-effective manner.
I don’t think a drone swarm will replace high-performance aircraft, but their potential is undeniable.