DDWRT, Tomato and OpenWRT have a feature that you can enable on the access points called "Bluetooth coexistence".
The available options are: Disable, Enable and Preemption

I could find very little information on this but essentially when it's on it makes a huge difference
to connected wifi clients who also use Bluetooth. I can find no such feature in RouterOS.

Would it be possible to add this?

I would realy like to see this feature too!
A2DP seems to not work for me in coexistance with my rb2011uas-2hnd-in...

Very important feature, some devices have poor WI-FI or Bluetooth performance without activating this option.

https://wireless.wiki.kernel.org/en/use ... oexistence
http://linuxwireless.org/en/users/Docum ... existence/
https://www.dd-wrt.com/phpBB2/viewtopic.php?p=540993
http://superuser.com/questions/429994/m ... oexistence