To fit the theme, why not add a mechanic that'll have to force your team to destroy a group of robots in order to move the cart foward after you cap or before you cap?

Ok so get this, there are 3 robots floating around the first point. In order to get access into the next area, you must destroy the robots so you can open a passage that'll lead to the next control point. It's kind of like the second point of Hellstone, in where you cap that point the gate opens leading to the next area of the map.