To touch on #4 a bit...my 10-year old son *loves* the wraps. Thanks to the geek-centric video library of his father, he was a huge fan of Tron long before Tron Legacy came out. When we got down to WDW when the tron-o-rail was out -- he was of single minded purpose to either get on that train or take pictures of it. Screw POTC, SSE or Haunted Mansion...he wanted to ride the tron-o-rail. I tried explaining to him that it was just Coral with a fancy paint job (I know it was a wrap, but to a 7 year old the distinction isn't there), he didn't care.
So when the Avengorail came out, same level of excitement --- and last year, he got my 6 year old daughter into it too. Every time we walked up to the station, she wanted to sit where Black Widow was on the outside of the train. Tears flew if she couldn't sit there....and utter joy and excitement if we actually got the opportunity.
When I recently showed my son and daughter a picture of the new Iron-rail, both their eyes bugged out.
They now know it's just one of the monorails....but they dont care. It's literally like an attraction to them.
So I now get it regarding these wraps. I know people think they're ugly..and I actually initially felt that way, but seeing how my kids react to them changed my mind on it.