We have, I believe, made the case against going to Uman in large groups for Rosh Hashana from Israel, since this denigrates the place of origin. A timely note: the same applies to women going there for (Shabbos) Chanuka (or is it Rosh Chodesh Kislev? Tu B’Av?).
If this custom grows even more popular than it is now, even worse.