Man, you're a bit of sunshine.
The points of your argument:
1. Local - Sure.
2. Untested - The rule changes may or may not be tested. These changes likely come about because there have been a lot of games with predictable results.
3. Home-brewed - In the Internet age, it's hard to believe that most tournament rules are exclusively developed without outside influence, especially since the RTs are so influential on LGSs tournaments.
4. House-rules - Sure. Even the main rule book encourages playing how you enjoy playing the game.
5. Train-wreck - That's just one opinion. In my LGS, and every LGS I've visited, 40k is by far and away the biggest seller and most played miniature game on the shelf.
6. "Balanced" - Every game is unbalanced, even chess when black gets to go first.