Both sound like solid tracks to me. The mix and sound quality is good enough in my opinion.
The only thing I really would want to hear, as a listener, is more of a build and epic climax. With both these tracks you have really nice quiet sections, but it never really grows and develops enough from that dynamic level. If you were to create a fortissimo climax with strings and brass playing the theme at full volume, with epic percussion hits, it would really emphasize the contrast with the earlier sections and give the composition a full arc. Right now in my opinion that’s the main thing that’s missing.
The only other thing I would do is run it through a limiter just to bring it up to competitive levels with other commercial cinematic music. Obviously don’t over-limit or over-compress, but you still have lots of headroom to work with so I think you could get some more loudness without compromising dynamic range.