"Hello, why is it that after I select a pose and click play, the character doesn’t move except for a slight finger tremor, but when I click the reset position, it restores the dragged character to its initial position?"
Hello. By "reset position" do you mean the RESET POSE button on the top right? It does indeed reset the position to 0. It's just a shortcut for the reset button that comes with the system.
It would be fantastic if you could remove keyframes and adjust the playback speed of each one. Overall, this plugin could potentially serve as a worthy rival to Timeline.