What one President can do unilaterally, another can undo. This is the problem with doing everything by Presidential decree and using politically loyal department heads to constantly write new rules into the system.
Chaos. Radical changed of policy was never intended, the rules were supposed to be set by Congress and enforced by the Executive but now that Obama decided to rewrite rules without Congress, every new President can now come in and wave their hands and make all sorts of new rules causing chaos like this.
I warned my left leaning friends about this sort of thing. Liberals were all cheering when Obama started writing law and going around Congress and I warned them then that they may be happy today because Obama is doing what they like but what happens when you set this kind of example and the next President comes in, maybe a President you hate, and takes this new power in hand and uses it in ways you do not like?