Hm, one bit of feedback I might recommend for ads is using cover when they are low, or if they are making it more obvious? It seems like most of the time enemies will stand out in the open regardless of their HP. Would make them feel more alive. His comment wasn't that helpful so, I hope this helps too :P
This does help, thank you. Yeah I'll pass this on to the creatures team, though they should generally have some evade behaviors.