A somewhat strange update - Primeval Abyssian will be having a direction change, both from an artistic and marketing decision. The game will not be marketed as "Lovecraftian" but instead will be related to what is more it's main influences and inspirations anyway - and those are hard sci-fi writers such as Olaf Stapledon, Hal Clement and Robert L Forward. I believe these writers deserve more of the credit for inspiration and deserve more exposure alike.
Of course all models currently sculpted are still in. Tolathians, Masters Of unlife and Luuran will remain how they are - which is, they were never really "lovecraftian" anyway, and I feel it is best to get away from the "cthulhu mythos" as far as possible.
Some races (ones that havent been sculpted yet anyway) will undergo radical direction changes - and there will be some new factions too such as the Psylorthion Conflux - which use oblate planets. The new races will follow from what you've seen of the Cascadians - which will be more high tech but abstract looking sillohettes.