In strat battles and siege/battle, you often find yourself hard-pressed to coordinate attacks or warn your allies effectively with the current chat and voice chat system. Many people, myself included, often pay little attention to chat while engaged in battle, and not everyone uses teamspeak. My solution would be to add a relatively loud War Horn(and I mean heard clearly from across the map) with a 10-15 second cool down.
What uses could this have?
Defense:
-Alerting of an enemy ambush while defending a fixed location such as the virgin in DTV gamemode, flags in strat battles, or flanks and breaches in the various defending locations of siege.
-A separate group assigned to a specific task such as defending a catapult or healing tent being overwhelmed and telling allies that reinforcements are needed
-A boost in morale and a signal to either fall back or push forward
Attacking:
-As a signal to charge, much more powerful than the current weak "chawwwge!" we have in voice commands
-A false warning, diverting your enemies forces only to find a lone horn blower while their main formation is broken
-Ambushing a specific target like flags or even a single player or faction you deem threats when you and your allies are waiting in separate locations.
Cons:
-Nothing!
Add this now and usher in a new age of blowing in this game!