I refuse to believe they would have went to all the trouble to implement this if they secretly wished for this to fail as some people seem to think. The opposition could have easily called their bluff if that were the case. I agree that they seriously underestimated the legal challenges that would occur, but they aren't intentionally causing this to fail. The OP article states that the programs implantation has failed when in fact it has been delayed but not failed because the case is not settled.
I agree that it's just one lawyer's opinion. Furthermore there are also lawyers who think there were good legal reasons not to publish the rule:
https://verdict.justia.com/2015/02/2...on-immigration.
Don't forget over 100 immigration lawyers signed an amicus brief stating the program was legal. It's not just the white house lawyers that think the program is legal.