so the horde mode that was talked about in beta in story really is not horde mode it is more defend spot a for 5 mins then move to next spot and defend that spot
to me a horde mode is something like i played in Gears of war, were me and my friends could hold up in any spot on the map and the waves knew where to find us and they were out to kill us, not a defend this object.
so in this hoard mode matchmaking should be more of gears of war style where we can get a open map. in the map mobs can spawn in many spots and try to overcome us
another horde mode idea will keep to the lanes we know.
there will be maybe 2-4 lanes the minions will march to a grinder like in meltdown and we have to stop it as a team, the longer the game goes the more and more minions are sent till finally the team is over run
also possible both modes can have up 2 ten players since it is all co-op