This looks like a really good idea
Just one query really,
Now I am one of those individuals who rolls their eyes while at File Planet when scores of people repeatedly whine about compatibility with other mods. IMO, it's a question of making a choice about what to install, I mean you can't have everything.
That being said, it's likely an issue that will come up, and as you know there are a number of Tel Uvirith mods out there, so it may be an idea to give some thought to this. At the very least, people will want to know if your mod is compatible with others, or whether it is not, so some testing will likely be in order.