Huge Jones fan here. His grappling, esp against tall guys, is not elite. He isn't like DC or Cain where he takes an ankle pick or high crotch single and runs the pipe (even though his rd 5 takedown in the first Gustaffson fight was exceptional), most of the time he uses misdirection trips/sweeps or double legs, which is wayyyyy harder against tall guys who got similar leverage and long legs.
I think as he's polished up his kicking game, his explosive wrestling game has diminished. Definitely not the guy who fought Shogun, Bader, and Bonnar.
...but he's winning, so that's all that matters. Hope he quits soon and retires undefeated.