No argument about anything you had to say about either Arthur Bryant's or LC's, except your comment about there not being any locals to be found. I guarantee you, possibly with the exception of the exact moment in time when you were visiting, that is not the case. Mrs. Roadhouse and I were big fans of AB's until a couple years ago when we experienced exactly what you did with an order of burnt ends. Sides of beans, cole slaw, and potato salad were equally weak.
On the other hand, the regular brisket sandwiches that were being consumed at the tables around us looked mighty tempting. AB's may have come to a point where you need to find just the right thing to order (I'm thinking brisket and fries), and not deviate from that combination. EVER.
As for his sauces, they are definitely an acquired taste, especially if you are used to a sweet, tomato based Chicago style sauce. I had that same assessment of his sauces nearly 30 years ago, the first time I tried them.
We had gone to Bryant's for a meet-the-family dinner the night before I dragged my future wife, a KC native, off to Chicago to live in sin until such time as we decided to do things proper-like. Being a Chicago boy who thought he knew everything he needed to know about good 'Que, I ordered a slab of ribs for myself, all the while chuckling at these poor know-nuthin' suckers around me who were ordering brisket, pork, ham, and some kinda dish that was burned (why on Earth would they want that???)
I look down at my slab which was served on a full sized baking sheet, filling it edge to edge to edge to edge, and noticed that there wasn't any sauce on it. Well, anyone who's eaten a slab of ribs from Leon's knows that ribs are supposed to be smothered in sauce. So naturally I grab the nearest bottle of AB's sauce and, without tasting it, slather it all over the full slab. I brought that first rib up to my lips and took a chomp, almost gagging in the process.
It was so bad I thought about giving up before I even got started. Problem was, my darling future wife's Grandmother had insisted on paying for my dinner and she sat there watching me to make sure I enjoyed it. I managed to choke down another bone or two before making some lame excuse about a big lunch and my eyes being bigger than my stomach.
It was 20 years before I went back to Arthur Bryant's, and even then it was under protest. I happened to be back in KC with my Dad who had read all the press that everyone else who has ever gone there for the first time has read, and he pressured me into making the stop. I related the above story to him, but he was insistent and I caved.
Keep in mind that by this time I had been married to my KC native wife for about 19 years. We had made multiple trips per year back to Kansas City and had experienced a good number of other local establishments, educating me in the ways of KC 'Que. Not only that, but I had since learned that Chicago Barbecue was not the beginning, middle, or end of the subject.
We ordered a burnt end sandwich ( by this time I knew what that was), some slaw, beans, and an order of fries. What a revelation! Somewhere in those 20 years since that first godawful rib, Arthur Bryant's had learned how to make good Barbecue! Holy crap, even his sauce had gotten better! The following Christmas when I was back in town with the wifey, we made a beeline for AB's and decided it was our new local favorite.
As I stated earlier, our love affair with Bryant's lasted until about two or three years ago when they greatly disappointed us. The burnt ends were just as you described them, soupy, almost tasteless, and more sauce than meat. We heard similar reports from others who had been there recently. We have never gone back to AB's; discovering in its place plenty of other places we hadn't visited before.
With all the other worthy Greasehouses in KC, I don't think we'll ever return to Arthur Bryant's. Still, those brisket sandwiches looked mighty good...
Buddy