I said in another thread, but think of swinging a golf swing (if anyone here does that).
People who have a fluid, solid motion and have natural strength and leverage will crush the ball and keep it straight and accurate.
When someone goes out there and tries to absolutely kill the ball and swing as hard as they can, the ball will be wildly inaccurate and difficult to control. There's no consistency to it.
I'm not saying that Tucker is 100% losing leg strength, but this might be the start of a physical downswing.