That might have been around the time - in the planning period, anyway - when shit really started to hit the fan and the three involved departments of show animation, toy development, and corporate intention refused to ever see eye-to-eye again. It is without question they intended for Airachnid to come back in a bigger role but they shoved so much crap in that they did little more than occasional cameos of the stasis pod, and when they finally had a chance to unleash her...whoops the show suddenly needs to unfuck the ending of the previous season and make Megatron illogically desperate for a new advantage, so out the door she went with all the insecticons because why should they explain her connection to them? Ironically, Thirst is otherwise one of the few episodes I legitimately think is good in all of Prime. Namely because no Autobots are around to prevent some great characterization bits and Airachnid basically is set up to finally fucking die later off screen as a result of Unicron's imprisonment (going off of how all the Dark Energon infected zombie dragons just vanished, and how Airarchnid is basically a zombie herself...) Amusingly, the Arms Micron bio I posted earlier actually does a better job of bridging one of the massive inconsistencies between the WFC/FOC games to the Prime continuity than the show itself. Namely, Breakdown in WFC was a messenger who got his ass kicked by Bulkhead, and so basically got himself jacked to hell in a beefier body to get revenge at some point. A similar methodology to Cybertron Swerve's bio so it isn't unprecedented. Probably. To this day, nobody knows what the hell they were saying with Prime Nemesis not being Trypticon in the Flying Mind episode, despite Trypticon's entire purpose in FOC being to become that exact Nemesis ship as well have a grudge against Megatron because it was a painful, one-way transformation.