As far as technical aspects, it's not really a CRPG. Aside from the speech system that was far inferior to that of Ultima 7 or Fallout (which isn't really a surprise it's similar but a pale shadow to Fallout's), Baldur's Gate plays more like an RTS.
You have equippable items and stats (no indication of a CRPG), D&D's character system (loosely, and still not indicative of the game being a CRPG), but the story is pretty linear, really the same every time, and the world feels dead. The environment is not that interactive, putting up yet another barrier to Baldur's Gate truly being considered as a CRPG. After all, the point of P&P RPGs is for interaction and choice in gameplay.
The implementation of their core rules took a back seat to poor technical aspects that still trouble BioWare's development, particularly in AI and pathfinding that makes Ian shooting you in the back seem like a mosquito bite. In fact, nearly everything in good taste was neglected in favor of Drizzt and having an uber paladin that could buy items cheap from the Thieve's Guild.