I guess a Autobot losing a T-cog is like a guy losing his well you know. It was a fun episode,I like the rare scene of Ratchet in his vehicle mode to pick-up Raf,did anyone notice how slow he drove playing up he's a "old Bot",also Bumblebee using that old truck as a go-cart to chase Knock Out.
He's not necessarily gone. If I remember correctly, the body was not destroyed; the government likely took possession of it. That leaves open possibilities...