Force has been carrying the show all by himself for over 10 years. I'm sure even he is tired of it.
The problem with Force is that there is no one in his organization to take his place. Robert tries, but is as dry as a popcorn fart, and his kids are obviously benefitting from pure nepotism which doesn't command respect, no matter how well they wear makeup. In fact, there is no one in all of drag racing with any sellable charisma to take his place. It's been evident for some time that he is forcing his bit, because it just doesn't come natural anymore, thus shuddering and stupidity.
His charismatic interviews are what separated Force from everyone else for years. But like most bits, it gets old and worn out, and he knows he's out of material. I am sure Castrol wants to move on from it themselves.
Years ago when the sport was viable, we would see a K.C. Spurlock or Dan Pastorini come out of nowhere and win some hearts. Since the team concept was started which forced many single teams out, Force, DSR, Connie now RUN this sport, there is nothing left financially viable to attract new independent blood.