I disagree. I think the changes have made most parts of the game super easy, where the Wine Cellar requires a little bit of strategy and forethought, I think the difficulty is set just right. I ran it solo (with 1 thrall) 6 times earlier this week, each time I got into a bit of trouble which almost killed my thrall, and each time, I felt exhilarated when Thag died and my thrall lived (once with less than 200 HP remaining). The Wine Cellar creates that kind of stress and relief that they were aiming for and I think it is perfect as is. Well, maybe not perfect, the Mace of Thag needs a buff as suggested by @Tephra here:
By the way, when I was running solo I was doing it with a level 20 Relic Hunter that has 3k health, so not the best tank and certainly not the best damage option.