I got to say it takes guts to come on this forum and offer a midi mock up service. That being said, I find your work to be incredibly detailed and quite musical. What I would work on though is your upper dynamic range. It's funny that I'm saying that. Usually in all the mockups I hear it's the lower dynamic ranges and musical details that needs work. In your work it's the opposite. I find that as the orchestration gets dense and the volume rises your samples aren't supporting your musical intention.I am currently in the process of redoing a lot of works. I’ve gotten new libraries and have since refined my skills in this field. These demos are a bit older, but I believe they’re still a solid foundation.