FIrst of all, thanks for the feedback! I think you are focusing a bit too much on IMT, the piece does not focus on them, it just uses them in one paragraph to illustrate the metric.
It is true that there are a lot of things (like starving, slow play) that is not captured by this metric. But it is basically impossible to capture everything and what we wanted to do is measure all big events, where a team gains a significant amount of gold in a short time.
Once we have more data for the summer season, I think it can be very interesting to see how teams do in these events when they are behind or ahead. Here, it can tell us a lot about a teams capability of coming back into a game for example.
Overall I really don't understand how you think currently the information is unusable. Do you mean because the observations for the summer split are still limited? Because otherwise I don't see how it is useless now but can be useful at another point in time.