How would that work with an L bracket? I find I save more time rotating the camera with an L rather than fussing with trying to get the ball head in a good portrait position.
The Manfrotto would be pretty clumsy with an L-bracket unless they were to add dual mounting plates. Meanwhile, don't drop your camera while switching mounting positions in a gale!
In my time I think I've tried just anout every combination there is for a portable setup and have been pretty well frustrated by some aspect of all of them: cheap, clumsy, sloppy, overpriced, too heavy...
With tongue firmly planted in cheek I've no doubt that RSS probably makes the sturdiest, but have to chuckle at the sheer cost of their systems when priced piece by piece, each for a different camera, lens, etc., and all outdated when you update anything. FWIW, I also find the broad debasement of their competitor's products in the catalog I got at WPPI last month to be disappointing.
Seriously, it's sometimes hard to believe that anybody is trying to make a solid tripod head/clamp/quick release without making profit their highest priority.