I was researching the Callaway Big Bertha Alpha 815 driver...dang that's a long name...and while the Honma driver gives you even the abilty to adjust the length of the shaft by inserts you add, the BB Alpha 815 seems to have thrown in everything but the kitchen sink.
yes, you can adjust the loft +2 degrees or -1 degree, yes you can adjust the face angle for open/closed face, like most drivers. But then there are the weights you can also move, a 7g, 1 1 g which goes on the toe and the heel. And then there's the center of gravity weight block you can reverse, one way it reduces spin, the other way it increases spin. So you can (in theory) set the face, set the loft, adjust the spin and then adjust the weights. With 8 possible combinations on the shaft alone, times 2 for the option on CG Block, times 2 for weights, that's like 32 possible combinations of settings.
Now I like being able to tweak it to see how things work, but that's a lot of tweaking. Seems like the weights and the face angle adjustment increase or negate each other...If you had a launch monitor, would be interesting to spend 3 or 4 sessions working through all the adjustments to narrow down the best fit...and then leave it!