Personally, as I had the Bat Primal figure first and didn't like the proposed idea of a Triple Changer. I would have preferred Bat to Gorilla altmode in the show.
All they had to do was make TM Inferno a Flying Ant and it would have given credence to this built in thruster. But no, they made him/"Scavenger" a drill...
Besides the point that his thruster is horizontal. In contrast to every other Flier. I would have understood if they made him run really fast as a result. Or even hover over terrain. But his entire design had no lift for flight.
![Head Explodes :BOOM:](./images/smilies/icon_boom.gif)