It definitely has. The character movement is very slow and impacted by the horrible pathing AI, the UI is still needlessly verbose, and the AD&D 2nd Edition ruleset is not intuitive at all. Even with a lot of experience with all manner of Infinity Engine games that were published by Interplay, I still get frustrated when a character doesn't move how I want them to move.
Sure those things you mention kind of suck but they don't detract from the fact that there isn't a other modern party-based rpg with RTWP combat that offers the depth and scale of content that BG2 offers, hours of strategic combat with awesome spell effects, excellent art direction, the storytelling, the dungeon design, high-number of companions with quality writing, side content that could be packaged into it's own game or expansion pack etc. To say the game has dated when everything about the game that is quality about the game has still yet to be surpassed is silly, although I object strongly to the term "dated" as a descriptor so
Anyway, the closest thing the game has gotten to a successor is Dragon Age which is pretty average compared to BG2 or even BG1 to some extent with laughable generic fantasy writing, lack of enemy variety, terrible sidequests, weak dungeons.. only improvement it offers is I guess a better interface, no AD&D messiness and better path-finding.
Maybe Pillars of Eternity will be that BG2 successor.
