You can now reserve a specific time to board the Studio Tour free of charge.
This coincides with the removal of annual passes, and subsequently, the removal of the Premium Star pass that included Gate A access to the Studio Tour. Also, Fast and Furious: Supercharged opens on the Studio Tour June 25th, and this could no doubt help alleviate the massive waits for it.
However, whether the reservations will stay till then and if it will be available all days or just peak days remains to be seen. Universal has not commented on the reservations, however we have reached out to them and will update the story with their response.
We have it from reliable sources that these were just a test for Fast and Furious: Supercharged, and will be used frequently when the ride opens.