True, but I think the idea is to get much tighter spacing with the ADS-B while keeping identical fuel efficient descent profiles for all inbound aircraft. In addition aircraft will spend less time in the air, burning less fuel than when subjected to normal ATC in trail spacing instructions.

Obviously when youre the only jet approaching an airport it doesnt matter, pull em back to idle at cruise, spool up at a grand, land, very efficient.

The downside is that now we will be responsible for maintaining the seperation criteria.