Im not seeing any map control. Just players sprinting into a gun battle die repeat. Witch was the single biggest problem with Halo 4. In other words reduce sprint speed or remove it and Halo will be great.
I think the lack of map control is because like other said
-midship being midship
-lack of power weapons
-no br start
But I think their map design really ruins a lot of the flow. I've watched the video a chunk of times and although I think a lot of it has to do with the player, the map just feels really claustrophobic. A lot of the walls cover sightlines, they have those shield covering the top, the map being stretched for sprint makes it harder to find and kill people on the other side.
I think the base mechanics of the game might be okay but the map design is what hurts them. They seem to lack those dominant map positions that traditional maps had. Like the sniper towers on lockout, the pit, and guardian. There is usually a central spot you want to control that you use in combination with power weapons but this and the other two maps don't seem to have that. It seems like their map design gives too much cover and escape routes instead of having areas where you can really punish people for going.
But maybe that's just something that will come when people learn the maps more.