You're saying that Square can afford to make symphonic suite albums for the very few people in the world that buy VGM, while Nintendo can't afford to orchestrate the music for their most popular series?
I suppose that's possible, but it doesn't seem likely. It just seems lazy.
I mean, even Blizzard used an orchestra for Diablo II.
That's not to say I don't like the music. Would have been tons better orchestrated.
You're forgetting that we are talking about an entire score, which can consist of over 50 - 60 different pieces (I'm not sure how much music is used in LoZ: TP). Square Enix's symphonic suites for Dragon Quest contain the best of the tracks from games (often arranged into medleys). Even then, it's a different issue because they aren't original scores, and make money separately from the game (and Dragon Quest, one of (if not, THE) the highest selling series in the world, and with over 20 years of trial and error, and with Sugiyama orchestrating himself, thus cutting costs in pre-production, Square Enix can easily afford to do this).
If Square Enix wanted to, they probably could've orchestrated the entire score to Final Fantasy XII (or any other Final Fantasy game, post-FFVII). Why not? It's Final Fantasy. But it's a HUGE amount of money, and a game's production budget won't usually have that kind of cash just for the sound.
For Zelda, it probably would've been better if the soundtrack was orchestral, but what I'm trying to say is, it's a big risk and a lot of money spent.
Why? Compared to how much it costs to produce a game in general these days, that's nothing.
For the sound division, you need to add the additional cost of the composer salary for the score (roughly, anywhere between $30,000 - $50,000. This is generalized, as each company will usually have their rules on paying the composer). In the case of Zelda, you have 3 composers, so that's also about $120,000 of money to the composer. Then, you need an orchestrator. In any good case, a decent orchestrator would charge anywhere between $3,000 - $5,000 per piece (knowing Nintendo, they'd want a pretty good one -- also, it depends on length of track and how many instruments required. And taking into account there is about 50 pieces in Twilight Princess). Totaling, you have roughly $250,000 just for orchestration and arrangement. Then, you need to find yourself a good orchestra (video games usually just hire out individual musicians for an orchestra; they don't use established orchestras often), and paying those for performance, rehearsal, etc., that can be anywhere between $50,000 - $80,000 depending on size (how many players, etc). Then comes the recording sessions, and, with Zelda and about 50 tracks, that can take about a week to about 10 days just to record (thus, anywhere between $80,000 - $100,000 for a big studio to fit 40 - 60 performers).
I'd hardly call that 'nothing' in terms of money spent.