The fate of the Empty Crown after the events of the Exomorph crisis are unknown; they may have been decimated or their organization may still exist within the Romulan Star Empire. However, Kleeya has revealed rumours to the attention of starfleet that a master key has been built, allowing control of exomorphs without the need for a control facility.
Blocky room design. Something like that can be ok in hafl-life1 but not really in elite force2.
Texture choices also seem little out of place not sure. Either change the ceiling or floor texture. Try to make the room less blocky.
Other than that it looks good.