It already exists somewhat in Legacy of the Foefire.
Details :
8v8 only
Flag carried to the center gives buff and can be taken away by placing opposing team flag.
Weak NPCs that do almost insignificant damage like the ones in Foefire.
Guild Lord is powerful(chieftain/svanir dmg) and takes more than 4 to kill.
Player respawns are flat and have a reasonable timer.
Destructible doors that are similar to foefire , just meatier and players must destroy at least 2 to get to the lord.
The concept is there from the past.