The D&D 5.0 grappling mechanic lets you do all that and more, denying your opponent's their strengths, controlling the battlefield, and generally exerting your will over any enemy you meet. And even the toughest great-sword wielder might as well just be packing a dagger when he's dragged to the ground with a Grizzly Bear on top of him. Good luck to any mobile, dual-wielding assassins when they are held in place by their collars.
It's hard to cast a spell when you are pinned to the ground in a zone of Silence. Taking 5th Edition Combat to the Ground (2.0)
