I can't agree with that, I think he hasn't made an effort to make a soundtrack for Tamriel. He's made an orchestra job for generic fantasies, but what can this man's music tell us about Tamriel at all? Name the characters in Oblivion who play his music in bars or campsites preparing for war. What has he added to the series if not that? Battle music? Why the [censored] does battle music exist in this series? This is the Elder Scrolls! Or does that not mean anything to Jeremy Soule? Forget this composer. Forgetting him is the kindest reaction to his influence on the series.
Though this topic is most certainly one based on opinion, I feel the need to debate this.
On that note, I would argue that his past two soundtracks are not generic, and that his music certainly has given us plenty of information regarding Tamriel ( I argue that I prefer the soundtrack to Morrowind over Oblivion, but I am a Morrowind fan nearly all the way). There's http://http://www.youtube.com/watch?v=GPJlkw12P1k, that grants a tone mysterious and azure, while delicately laced with the undertone of a subtle sense of importance and grandiose bearing, almost as if to relate a forgotten temple or palace; http://www.youtube.com/watch?v=VPw1nJxMvS0, which I may note sets the perfect pace for a traveling adventurer on the road of discovery, or for the new and overwhelmed foreigner who happened to stumble into an imperial citadel; http://www.youtube.com/watch?v=Ba0h4Z21wT8, which, again, lends itself to a sense of mysterious, or a sort of peaceful weariness, a sense which one would expect to find enshrouding an artifact divine origin or relation, or perhaps to the 'age of a soul, or the 'maturity of a soul'; http://www.youtube.com/watch?v=DORtFo2MAE0, which is the perfect set up for the grand adventure Morrowind leads the player on http://www.youtube.com/watch?v=wZjnnEApRTE, and a number of other fabulous pieces.
Now I find your issue relating to the lack of life regarding musical performances irrelevant. I would not see a lack of minstrels as the fault of the composer, but rather something overlooked or ignored by the creative director. Perhaps if said director made a greater attempt to increase the immersion, such issues may be rendered void.
In summation, I find it rather a cruel statement to trash this composer. He has offered plenty of compositions that lend various tones and rhythms that certainly lend to the game. Do you argue that the music isn't bold enough? Fine, I can accept that. Surely the music should certainly hit a better cord with the player, raising the tempo and the level of sound. Other than that, leave the composer to his own musings (or that of the director's), and let him compose the next soundtrack.