"Who Can Say Who's Experiencing Deveykus?"
Smashed Hat commenting on "Cross-Pollination"
Davening is such a subjective thing -- who can say who's experiencing deveykus?
But to judge from outer appearances, there are still a number of Chassidic groups and smaller chaburas that stress intense davening: Breslov, Toldos Aharon, Toldos Avraham Yitzchok, Slonim, Karlin-Stolin, Stutchin (54th St Borough Park), Emunas Yisrael (16th Ave Borough Park), Rav Zilberger's chaburah (Yerushalayim), Rav Ehrlanger's chaburah (Yerushalayim), etc.
The Rebbes and roshei ha'chaburos of these groups do speak about deveykus, at least much more than in the broader "frummer velt."
But the emes is I davenned in Chaim Berlin on Simchas Torah morning and found it to be a high quality davening, too. This probably reflected the fusion of Mussar and Chassidus that Rav Dessler was recommending.
In the final analysis, it really depends on the individual, not so much on the group, just as long as the group situation is congenial to davening more deeply.
Maybe the criticism of contemporary Chassidus was not so strictly centered on davenning but in general on the de-emphasis of individual avodah, involving hisbodedus / hisbonenus / cheshbon ha'nefesh / limud pnimiyus ha'Torah in depth, and the dominance of the kehillah aspects of Chassidus, keeping away from secularism, and emphasis on kedushah.
All of this existed in the past, too, but maybe the emphasis has shifted. Especially after the Tzanzer Rov and other great Rebbes of the mid-1800s decided that "mysticism for the masses" was not succeeding, and began to put this stuff under wraps for those who were real mevakshim and who prepared themselves properly.
As for niggunim, it is true that Jewish music took a nose-dive here in America. I think the niggunim are still sung with hislahavus in Chassidishe shuls, and Borough Park is much better off than Flatbush in this department. But who is creating new niggunim in the traditional styles that are as deep as the old ones? This worries me.