I don't want to wade too deep into this, but it doesn't have to be all or nothing. It would be possible to have media at one or two practices, maybe not even even an entire practice, without ruining every secret that the coaches have up their sleeve.
Example. The media goes to one practice for roughly 40 minutes during position drills. Two weeks later, the media is there for a scrimmage. Nebraska runs 120 plays during the scrimmage, but the media is only there for 30-40 plays.
NOTE: This doesn't necessarily mean I'm upset with how spring practice is being run or how much media availability there is.