I have no insider info, but does seem strange to skip Wisco. I don't think BSU is going to place 1 or 2 at regionals. So don't they need the points at Wisco?
I can see missing Griak due to being on a later training schedule because of oly trials - but missing Wisco, where you are the defending champ, suggests to me that something else might be the cause - like injury, or illness?