This is a two parter.
First of all, after recent events it has been discussed that police should in some way alert people to their presence during a raid.
Currently you cannot bind a /y to doorkick because doorkick is also a say command and you cannot bind two say commands
Bind key "say /doorkick;say /y POLICE PUT YOUR HANDS UP WE ARE COMING IN" is not possible.
Recoding /doorkick to be a console command (or adding an additional command so /doorkick can still be used) seems like an obvious solution to make all parties in this debate happy.
Second part.
Add an audible door breaking sound to a successful doorkick that can be heard through walls. Not sure how possible this is, maybe a /me would also suffice but again the noise and /me after the doorkick would be nice.