You're too quick to armchair general your kids team.
For all you know, this is an attempt to ease them into running 5 or 6 miles continuously. In fact, if they weren't told times, I can guarantee you most of them will probably be going barely faster than their easy run pace.
If her coach was having them do this exact workout on the roads, you would be complaining that her coach has them out gallowalking, and that it is way too easy, and that you are a runner, so you know that continuous running is the only way to do things and that in 20 years you've never needed to gallowalk.
Until you have more information, leave well enough alone. And if you are still concerned in a month from now when you've seen a more complete picture of their training, it is best to assume you're getting distorted information, since that is how teenagers brains work, they distort reality.
At the high school I coach at, we have a policy that no parent ever talks directly to a coach about workouts, play time, etc. They can only ask about logistics, scheduling, volunteering to help, etc. Any discussion of training strategies or who is in which meets has to be done with a vice principal and the athletic director present. It's great, keeps everybody happy.
I do let parents come talk to me to get clarification even though I'm not supposed to, but don't entertain any discussion beyond that. No parent has ever then felt the need to have a conference with me and the administrators.
We also have excellent numbers of volunteer parents for our fundraiser and to help run meets, despite being in a mixed income neighborhood.
I'd suggest you suggest these changes to your daughters school before you do any damage.