Eh, Tal Tal Mountain is exactly the one track I'd do with a completely different vibe. Rock-ish, even.
I'm generally not a fan of overdone arrangements of chiptune music. VG music from that era had a very distinct sound, and going overboard with orchestral music can only change the overall vibe. It's a case-by-case situation. I loved what they did with FF7, with the exception of the battle theme.