I would like to say a few comments:
1) The new administration has a different policy regarding immigration and the immigration agents are subordinates of the President. Most of my displeasure with the new administration is because I think that they are racist and my family is half/half Korean Argentine.
2) I always suggest to do not came back during January. It is difficult to find your lawyer and for him it is difficult to find a judge. And Judges get very upset when they have to deal with habeas corpus regarding re-entrying the country. They are working during vacations only for people who is in jail and their lives are in jeopardy. So, it was a very unusual habeas corpus where we were shouting each other at the phone until the Judge gave up and made the call. As I always say, Habeas Corpus is a very effective and fast resource because there are not formalities. I made it by phone, the Judge called Ezeiza right way. It was a 3 minutes procedure.
3) It is wise to fly from/to Uruguay and to come back to Argentina by bus. So, in the worst escenario, you are deported to Uruguay.
4) Do not arrive on flights during hollidays, weekends, night. The best option is the morning about 8 AM.
5) Forget about the Colonia runs;
6) Forget about trying to predict how many time you can do the colonia run or to overstay.
Regards