Good ideas,
they would be fun to have just for the sake of variety on maps. But they'd be pretty low priority for anyone of the devs willing to model them.
This would actually be a very good opportunity for someone who wants to learn how to model. Make some of the parts that would need to be added, UV them and texture them, learn how to make lods for them etc.... The extra parts are very simple to model, they just take time and patience.
If you can do that A) you've learned some VERY valuable modeling order of operations and B) you'd give stubfan more incentive to take your model and add it/re-export it into the mod
No guarantees tho