
My first tries to post this were auto removed because of the link to the article. I'll post it in the comments instead.
Basically the system now:
Day 1: get pre tickets the first chance you get in Augas Calientes (earlier the better, but at 2pm on May 6th we were still within the first 600. There was no line)
Day 2: buy actual tickets for your entrance the next day. The time that you can buy the tickets depends on your pre ticket number (timetable in picture☝️)
Day 3: entrance to Machu Picchu
All in all this should prevent people from having to stand in line ridiculously early.
(Clarification for day 2: The picture shows the timetable with timeslots/turns they showed us at the office. Your pre ticket number that you pick up on day 1 gives you your timeslot/turn for day 2 to buy your entrance ticket.)
Hope this can be helpful, as there is very little official information available.