The length of five rounds depends, and I think that's great if you want a short game. But I would like to see an Firefight variant that will last longer, and smaller maps (In my opinion, the "mission" of killing 100 Crawlers takes forever, same goes with Grunts and Jackals) and more random spawns for the enemies. The covenant is pretty easy to predict where they will spawn, also make them more active/aggressive, let them Hunt the players, make the bonus skulls visable and announced between rounds or intermissions like in ODST. And bringing back the original announcer would be really cool, because Palmer does not sound very "entertained" in her work. But because this is Warzone, I don't mind Palmer in the intro/outro, but as soon everybody's is jumping out of the pelicans it would be awesome to hear, (example) like in ODST: "Set Start" and "Tough Luck, Catch and Black Eye On".