Well, omicrons are the rarest material in the game. It makes CG no money to give back materials already invested after they make a change that diminishes the value of what the materials bought us. In fact, this is the same thing that happened last year with the Great Nerf. We invested gear and zeta mats into Wat/Vader/JKL etc. The made a change that lessened the toons' functionality, i.e. their value in the game diminished, especially Wat, who had a part of his kit taken away with nothing added in return.
So by CG's late stage capitalism logic, they're following the precedent.