Majora's Mask 3D is a bit of a contradiction. It is perhaps the most modern Zelda title; but this makes it at times feel nothing like a Zelda game at all. MM3D subverts the franchise's core values (exploration, purity of heart, temperance) in a way that teeters on modernity, reaching toward innovation but not quite breaking free of convention. MM3D both suffers from its allegiance to the Zelda ethos while also etching out a unique position within the franchise's context. Ultimately, although its attempts at innovation have mixed success, the core Zelda gameplay is still fun, endearing, and challenging.
I understand the fierce criticism accompanying The Dark Below, but I don't think it merits such animosity. The new content offers more frequent loot drops and there are many options for buying higher-level loot. This expands access to high-level activities for both players who buy and those who don't buy the expansion. Making Destiny more accessible in this way is a welcome addition to a game built around its cooperative environment. This remains a game best enjoyed with friends, so the more people playing, the better.