Some modders are good with arts and have done stuff for others, like Anicha doing the explosive biters, why not ask them to make new races, Because the recycled graphics from starcraft I are not great sorry.

The initial goal of my mods was to port SC1 units over. Not looking great is never a concern on my end.

If someone want to build a new race with new graphic, I'll support that. However, I won't actively look for other artists to do new race, since it's not a small task to ask and I'm busy enough with the mods under my belt.