This is going to be a logistical nightmare. There is only one road, and it's the race course.
How are Team cars and/or neutral support going to follow 180+ riders up the climb, leaving at 2 min intervals with no way down the mountain except back the way they came. Into on coming race traffic.
Seeing as the recent stage winners finish the climb in 37-39 minutes at the end of a long day, the winning time is going to be under 30 min. Utilizing the standard 25% time limit standards, pretty much everyone except the 20 best climbers would be eliminated.
Im sure they will do away with the 25% of the leaders time on that day, but how are they going to deal with the traffic problem?