I am a teacher, and at one school I worked at, we had a similar system pushed on us about four days before the school year began
It was very much a "you have no choice, worthless peons" kind of thing. Many parents were happy with it (modern! Must be good! More personalised!), most just didn't bother checking it (seriously, that much data is kind of irrelevant for most of the kids), and several were upset about it. It was hard to get across the fact that this wasn't optional for me--I had to use this system or I'd be out of a job, literally. I'd love to make individual phone calls to each parent who wanted it, but unfortunately there is more than one parent and it often isn't practical, especially if they want the play-by-play kind of level of detail, since that would require something like weekly phone calls. I taught six classes, with maybe 5-10 parents who were unhappy with the system per class. This worked out at over an hour each evening that I'd be spending on the phone, basically saying, "Your kid is doing fine. Let's go over a huge number of data points that say exactly that." On parent-teacher nights I'd be happy to talk to them, or send a very short note home once a month or something, but what was being asked, as reasonable as it was, just wasn't practical.
I can fully get behind this point of view. But as understandable as it is, it simply might not be possible to cater for. Maybe ask that if there is a problem, then the teacher contacts you directly, but otherwise leave things as they are, or see if she's able to find time to chat with you briefly once a month/term/etc. It needs to be understood that anything the teacher is able to do is probably going to be done in their own time, as well, so be thankful if they are able and willing to give up precious free time. Not that I think you're not grateful or anything, just that I had so
many parents who were offended that I needed things like sleep.
And to be fair, although one could argue that it's just as easy to take the same amount of detailed data down on paper during a class, in truth that doesn't happen. Twenty or thirty years ago it was unthinkable, or at least incredibly rare, to take down that much information about an entire class of students throughout the lesson. A couple of trouble makers, sure, but not thirty kids at multiple times during the hour or however long each lesson is. I don't think this much information is very useful most of the time, to be honest, but the fact is that these systems do enable more data to be taken down, useful or not.