Have to agree with this. The story was pretty basic. At least in the first game. The games scores tremendously on content and replay value, though. The companions and the combinations of companions was a particular joy too.
Well, BG wasn't about the story. It was revolutionary because of how it brought back D&D as a viable platform on the PC. The old reviews were all about gameplay, not story. And ignoring the commercial reception, BG2's edge over PS:T was considered fun gameplay, not it's (by comparison) pretty underwhelming and mediocre story.
Bioware's original niche was greating relatively fun, but cliche, B-movie stories combined with great gameplay. That was the BG series.
NWN was a total flop when Bioware wanted to get on the LAN MP wagon, much like Tales of the Sword Coast (with HoTU moving back to BG styles).
And then we had KoTOR, which was a radical turning point for Bioware and the game they've tried (in different ways) to always redo. That was the birth of their cinematic style and push toward accessibility. Every game thereafter was fundamentally influenced by KoTOR - JE, ME1, DA:O.