Hi Pilou....

Here are my comment :
1. I think the function of the layer it`s self is great, but the layer make the UI of MoI more traffic. I think you must redesign the layer placement.
Hi Michael, remember : Make MoI as simple as possible. It`s not good to many toolbar !
2. it is just your / Steph idea or will be MoI V1 have that layer ?