Word about upgrading things:
You'll generally hear more about the flaws than the successes...
Another note about this type of work:
The fact that you're getting many comments at all is a very good sign that you're going the right way.
Don't be discouraged just because people are saying you can improve things, that just means they support your idea and want to see as much success out of it as possible. I learned that a while ago when I started modding Morrowind for the first time... frankly my first mod was ok, but that's all... it wasn't great... but I got a few comments on how it looked good, and lots more about how it could be improved.
People are interested in this mod. Consider any post of constructive criticism a complement. (Flames, on the other hand, are best ignored altogether.)
I think you're doing well, it takes a lot to get me interested in a project for as long as I have been. Normally I lose the will to contribute in about two days... and even still I'm reading the thread, which I hardly ever do after I slow down in the contributions...
If nothing else, you have my support.