I'd honestly keep the Drones or else it just becomes weird.
Firewarrior with BS5+ who are a dedicated sniper unit? Not even with a particularly powerful weapon? And they can sacrifice themselves for any infantry or battlesuit? Like, what? Oh and not to forget they'd need jetpacks to explain the Fly rules.
And to explain why they don't benefit from stuff that affects other Infantry but instead get affected by things that would affect drones will be very "interesting" as well.
(though I guess you could model them on slightly higher hovering drones from the Ethereal box).