Unfortunately, complaints like this actually make the show seem more exciting than it is...the problem is not too much edginess, it'd too little content. Frankly, I wouldn't even mind going back to the old, boring, pre-reboot Top Gear. At least it was mostly about cars.
Of course, the Reliant Robin Space Shuttle episode was the moment when TG jumped the shark, so we shouldn't be too shocked about a downward spiral of quality. I think the best days of the show are well in the past.
Your right, TG definitely isnt what it used to be. Even on 'new' top gear, the first few series were mainly about cars, being the star of the show rather than just a by- product of it. But the past few series have had much more emphasis on humour, much to the extent that it isnt just a car show anymore. Anyways, still love it and cant wait for this new series to start