Dude,
The advantages are as you mentioned. Not being able to switch skirts also means that the shirt will not slide down the hook shank during a strike. Color placement is another plus, when you put an accent color on top, it stays on top. Since you can add your colors in layers, you can even put accent colors on each side. I use nylon upholstery thread, couple bucks for a bazillion yard spool at wally world fabric dept. The nylon doesn't rot and you can seal each knot nicely with super glue. I have not tried the wire so I can't help you there. Hope this helps.