We are now at three issues very quickly.
1. The drones now attack regardless of how many you are engaged with and not limitted to 2-on-1 which was the case before the last patch. It's a bit much, in my educated opinion. Could you please restore their 2-v-1 limit as it was before the patch.
Which leads me to 2:
2. Since the latest patch there appears a new <> under Options -> Arena Setup -> CM Tools -> Match Play. There's a Match Play Settins window, including a Save Vars and Apply button. They don't work. Well they work, but don't do anything useful. Much the same as traffic wardens. What I mean is, you can't actually make changes to the arena. I don't know if that's intended for privately hosted arenas only. I don't know what your intention was.* Which raises point 3:
3. Even when hosting a player-initiated arena I had tremendous trouble configuring the arena and saving changes. I had help from other players who had also limitted success. There, there were two pop up messages reading unable to save config / vars, whatever. There was a trick someone found involving configuring online, then initiating the online but I couldn't get it to work. I used to have configure planes at fields and other preferences each time I started the arena.
* we can have a talk about private arenas. I did try to host one on and off in the Euro Timezone for about three months. In my experience they don't really function well or function the way everything is presently configured. In the end I just gave up on the endeavour as it wasn't productive to continue. I'd make suggestions but don't know if your server space is more limited since your recent changes.