People forget that the only reason Paxton was successful with the first lawsuit was because of the administrative procedures act not because DACA was ruled unconstitutional. Ironically it was that same APA procedure that brought us back DACA.
Even if Paxton were to sue DACA, it would take time for a judge to make the decision and even then who knows if he will be successful or not. Let’s also take in consideration that Kris Kobach once sued DACA on behalf of ICE and lost so this wouldn’t be our first lawsuit.