Remember, it only took a memorandum to create DACA.
There are worthwhile things that could be done, but aren't because it would be considered politically incorrect and a risk to Trump's reelection. Trump is not a principled or truly committed to all of his campaign promises on immigration.
How do you explain the Trump administrations issuance of work permits for asylum claimants within 30 days of crossing our border illegally. No, they didn't all enter through a port of entry. Of course it wouldn't matter if they did because they still shouldn't be getting waivers issued to them by the Trump administration. According to law, those work permits are not supposed to be accepted before 150 days. These kinds of actions just encourage more illegals to play our immigration system.
To many of us it would seem like Trump is deliberately aiding and encouraging the current flood of illegals crossing our border.
Personally, I think it should bring question to everyone's mind that Trump fired two of the three people we knew were committed to halting illegal immigration and securing our border (Steve Bannon & Jeff Sessions). Some folks may make excuses and say that immigration and border security had nothing to do with those firings, but in view of everything going on, one has to wonder.