First off, I'm very happy to see some Shining Force mixage! I'm more of a fan of the second game, but I do remember this source tune.
Interesting mix of synths and acoustic instruments. Production-wise this is certainly in the early stages, but you have good arrangement ideas going. My main crit would be with the structure at this point - there seems to be a lot of repetition, repeating the same parts verbatim as the piece progresses. You may have plans to make them different from each other with production and sounds later on, but I think this might be a good stage to make sure that the piece progresses fluidly and has enough variation on the arrangement level. It feels a bit long right now, don't be afraid to cut sections either.
I'm not a huge fan of the classical quotes, at least the one that I can recognize. Well, more precicely, I don't like the quote at 2:01-2:06, but later on the same thing is used more subtly, with variation and I assume it's mixed with the source - that is alright with me.
I really like the busy start-stop harpsichord and slow oboe towards the end.
Mmm, lovely source.
--Eino