I agree that Paul Reiche amd Fred Ford's original creations / alien races should not be altered without their involvement or consent. Along with new races however, I would really like to see races that influenced by original alien races. For example, races that united (a hybridization like the Chmmr or an alliance like the Zoq-Fot-Pik). Or perhaps an evolved or sub-species that can trace their roots to original races (like a Human/Syreen race blending stylistic elements of both). One of the things I really enjoyed about the original games was the variety of aliens, particularly the non-humanoid ones like the Chenjesu, Chmmr, Sylandro, Mycon, and Taalo. I would really like to see a number of these interesting races in the new Star Control.

Some sort of Alien race similar to the Ilwrath that cloaks.   I really like their ship with the wings where you can trap some of the ships.

Reminds me of the Klingons.

The Mmrnmhrm transformer type ship.  A ship that transforms would be cool.   A robotic like race.

My humble opinion would be to second Human ship made during the time period of SC2. Not hard to fathom as resources were gathered, some made it to Unzervalt (Vela II).  The Hierarchy's unstoppable march through that part of the galaxy caused fear and survival instinct kicked in.  The colonists  used all their resources to include their dwellings and with the assistance of the ship factory built another ship. This time it was like a earth cruiser as they had the schematics to build this type. Modifications had to be made due to less materials. This splinter group struck out because they feared the intrepid captain would not be able to save them. This ship, set out into deep space in search of another planet far from the Hierarchy. The ship was pulled into a worm hole or other space anomaly and was sent to another part of the galaxy. This would make new aliens very plausible. It would be a way to include previous mentioned races as they explored the area of the anomaly and fell in themselves. This could bring up new enemies, new friends, new technology and still keep the integrity of the previous timelines.