Double Hierarchy? Parent Wireframe Mesh?

Hi, I started using Unity in July for a games production workshop at school. At the time it was Unity 2.6 and I was very excited to begin using the program. However, over the past 6 months of using Unity daily and understanding what it can do and provide, I have encountered some inconviences. The two prevalent ones that I encounter daily, if not hourly, are creating custom collision and parenting objects within the hierarchy.

Creating custom collision - I will create my empty gameobject and add the desired collider. That parts fine. The problem starts when I parent it to an object. Once I have done that, the collision only appears for the selected object even though I have selected a child. It makes setting collision on objects that require multiple colliders very annoying. If a wireframe mesh of the parent was visible, this annoyance would be cleared.

Double Hierarchy - When I have scenes that are consisting of thousands of objects, some of which are multiple duplications of the same object, parenting objects can become quite time consuming and frustrating. If a second hierarchy could be implemented to allow quick parenting, the process of parenting would be made much easier. Right now I have to drag the item through thousands of objects searching for the one that I want to parent it to. If two hieracrchies could exist with the same objects but I could make independant selections within, them this process could be greatly sped up.

I realize these are not question but more of requests / suggestions of some modifications. If these or one of these are already possible, then I would more than happy if someone could let me know. I expect to use Unity for quite a few years more and I am looking forward to its progression.

There's nothing stopping you from making another hierarchy pane, or in fact as many as you can fit on the screen.

For your first part I am not exactly sure what your problem is on this. You said here:

If a wireframe mesh of the parent was visible, this annoyance would be cleared.

You can do this by going to the top-left side of the scene view and changing "Textured" to either "Wireframe" or "Tex-Wire".

Now for your second problem, you can create more hierarchies by going to any panel's very top-right corner and clicking the drop down menu that looks like a downward arrow and 3 lines. Go to the side menu "Add tab/Hierarchy". Place it wherever you want.

I hope this helps.