Comparisson picture of the five wave-1 PCC Commander toys in their Powerup (combiner) modes.
For those who don't know, every Commander toy has the ability to be a Combiner, but only some are packed with a set of drones (5-packs), while others are just packed with a minicon (2-packs).

My guess is that the designers picked the ones that looked best in Combiner mode and packed them with drones, as that mode would be the form featured on the packaging - the less appealing ones were then put in 2-packs which don't even show their Powerup mode.

Top row is Searchlight, Smolder and Huffer. Bottom row is Skyburst and Bombshock. In the middle are the Minicons in their Chest-armour modes (just like the Commander Powerup modes, these Minicon modes are not shown on the packaging).



I think Huffer would have been a good 5-pack Commander, but Smolder and Searchlight have flaws, so isn't surprising they were put in a 2-pack.