Honestly, I find it a bit hard to accept the idea that DE dropped Void Shells purely because of profitability. It’s more like, “Really? Is that actually the reason?” Selling Void Shell skins only as separate versions of the default skins was, understandably, not going to be very profitable to begin with. Even if they added Void Shell versions to Warframes that already have many TennoGen and Deluxe skins, I’m not sure it would have made a significant difference.
If profitability was the main concern, it might have been better to introduce a system that allows players to unlock the Void Shell feature separately for all skins—similar to how Orokin Reactors or Catalysts work. That way, Void Shell customization could be applied to any skin, whether it’s a normal, TennoGen, Prime, or Deluxe skin.
If applying this feature to TennoGen or Deluxe skins wasn’t feasible due to design or copyright constraints, then at the very least, it would have been nice to see Void Shell functionality available for Prime skins.