Considering the remakes of this theme that Blizzard themselves did (Thrall's unofficial Theme in WCIII, then again on the WoW soundtrack as an exclusive track, and then again in BC's Escape from Durnholde dungeon), this original track saw a lot of remixing and remastering love.
But no one went back to the very root track and brought it up to speed. This does a fantastic job in doing that. This was my favorite theme from WCII, and while I was happy it resurfaced in WCIII and then again in WoW, none were the original. Even now, with Pokemon, WoW edition (*cough* er.. I mean Pet Battles, sorry), where they use some of the WCI and WCII raw tracks, they didn't do anything to it - if they had done what you'd done here with the orchestration, I think it would have kept the quality we expect from the modern Warcraft, while staying true to the nostalgia of the original track.
Well done!