If I were to change spy drones at all, I’d tone down the healing debuff, decrease the active time, or increase the reload time. Possibly a combination of those. But the bumping into something to get rid of it is really nice. It creates a bunch of tactical pressures - bump the drones off and take somewhere around 100 damage plus whatever enemies do? Pop a multipurpose and deal with 4000 damage on the margin? Or take it like a man?
I’d only make it harder to remove. Like, unless you make a good crash into something they wouldn’t disappear. But I think they’re fine as they are now.