Is about college students right?Anyone and their dog can criticize, but can you give him recommendations on how to improve them? Try some constructed criticism instead. Which means tell what you don't like, but offer solutions or suggestions. If you can't do that then you words are as worthless as the pixels to create them.
Where i live college students averagely look like in their 20s.
Step 1: tweak the girls so they don't look like 40yo.
But overally i simply don't like these models. What can i suggest aside swapping their heads with better ones? The red haired without the shitty make up, and long haired brunette are not so bad. But the others are pleasant to the eye like pepper spray.