When a brewery ties itself to a specific style, it can cut a couple ways. One is that certain styles are left aside that are fun or hot sellers but it can also mean that hardcore fans get chuffed if you do anything other than what your mission statement from years ago said.
Enter the elegant solution of collaborating with another brewery when you want to break out of the straitjacket. Hence, Enegren teaming with Institution Ales for an IPA.