First up, as far I can tell this seems to be a MIDI rip with a sound upgrade. While I commend you on the attention you've put into the instrumentation (each section sounds very rich and nicely balanced) there isn't much else that can be said other than that. A good technical exercise I guess?
There's a fair amount that goes into this source that, especially using the instrumentation that you've showcased here, could be re-arranged into something equally epic or beautiful (or both). Of course if what you were going for is a straight MIDI rip then you've done an excellent job regardless