Yes, it is definitely early to make any definitive judgements. If I remember correctly, in the first few years under Bergevin the Habs won multiple divisional titles after being 3rd worst overall in the previous year. Regarding Hughes, I think Gorton (with Molson’s blessing) picked Hughes partly as a reaction to what I believe were Bergevin’s 2 biggest faults as GM… contract negotiations and player development (specifically regarding the 2 top-3 picks). Hughes obviously brought a ton of experience with contracts, and his picking St Louis as coach is one of a bunch of moves Gorton and him made to give a better chance to young players (many of whom were drafted under Bergevin) such as Caufield, Guhle and Mailloux to reach their potential.
In any case, I came to this thread to see how Mailloux is doing lately, and it certainly sounds promising for the Habs. The Habs really look as if they could be stacked with a surplus of NHL-calibre blue liners in a year or two, and like Nashville a few years ago, that will give Hughes the luxury of having assets to be traded for where they are weaker without simply shifting one hole for another or giving away high draft picks. Bergevin never had such a luxury, which of course at some point in time was largely his own fault.