Campaign: Could you allow the Skink Foraging Camps to recruit Feral Cold Ones, instead of the Dinosaur Reserves? Right now there is no reason to take them into the late game, as they are outclassed by the Cold One Riders. This will allow you to recruit them in the early game, as anti Cavalry units.
Battle: Could you grant the Feral Cold Ones a bonus vs Large of +8 ? This is a small boon, to compensate them for their overal underperformance (even taking their very low cost into account), and will give them a role in online battles as a very cheap anti Cavalry option as well.
These two small changes would make them a lot more interesting in both the campaign and in online battles.