I wouldn't mind any of the formations turning tighter -- PROVIDED -- the physical capabilities of the drones were addressed to prevent any overspeeding to catch up to the lead. As it is now, you can firewall your lead bomber, make any kind of turns/twists that you want, and if you get to a point where your drones are left behind, they will simply start moving faster than they should be capable of and catch up. To observers I believe this is where a lot of the drone-warping occurs.
If instead you actually had to slow down the lead bomber for the formation to catch up, then I wouldn't see a problem with the drones turning a little better. Maybe make them match any control input by the lead pilot, but with a quarter second delay.
But to prevent some really radical manoevering (which would be contrary to formation flying, right?), why not also make it so the drones and the lead can actually collide with one another? So if you want to try to dogfight with that B-26, knock yourself out, but be aware of where your wingmen are lest you suffer a mid-air friendly collision.