I'd personally like to see some more open and large scale Crucible maps. I miss having First Light and Bastion in the Control rotation.
I'd love to see some more elaborately designed maps with both large open areas and some close quarters kill zones. Getting melted with a shotgun in a tiny hallway is starting to get pretty old.
Not saying I don't love the current maps, I'd just like some more variety.
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The only map that pretty much only plays small is The Anomaly. All the others can accommodate any play style.