Thanks for the feedback floofyboyo11!
Pretty much all the art credit goes to my brother, DaBurgerBandit!
Getting faster was definitely something we wanted to implement, but I guess the solution we tried near the end didn't have the effect we hoped. Currently we have multiple spawners that each have a different delay on each of them before they get started, and then they spawn at semi-regular intervals afterwards. If we add more spawners, but with greater initial delays, then we can easily make faster and faster overall spawn rates.