The Banshee has shown me one thing though: Drones can be exploited really badly. When I saw that they could actually stop that enemy from being able to fire at all, I went and experimented with them some more... I'd said that something needs to be done about them before, but after some real time with them last night, they might be outright broken. I'm thinking that drones in general need to have their ability to block shots removed. Even just one drone can take an enemy like this and make it do.... absolutely nothing. I tried this against heavier targets, smaller ones, and bosses, and, most of the time, it can work, and it's not that hard to do. Even the game's final bosses can be made trivial with a drone.
And that's with just ONE of them. 2 or 3 makes you unstoppable, and it's not hard to figure out how to use them to do that. By the time I had 2 drones I'd stopped being at all careful, even when dealing with Hard mode bosses, because chances are, I wasnt getting hit by anything. At 3 drones I DEFINITELY wasnt getting hit.
It's just like what happens when you start to get defense flies in Isaac; bullets are just no threat anymore. It works in THAT game because Isaac isnt exactly meant to be very balanced, but here is a little different.