What's the shape and material of your current tailpiece? And what you are trying to achieve by changing it?

What I understand is that this is a matter of string after-length. I would personally stick with the fact that we should avoid by all means having an afterlength less than 1/6th of the vibrating length. Given that, and by securing that we maintain the same vibrating length on the instrument I suspect that a compensated tailpiece should (or could) give the ADG a more powerful character, increasingly from string to string. (since the afterlength increases each time). So in theory, it could enhance your sound.

Anyway, to sum it up, from my experience so far:

1) Bigger afterlegth could lead to more powerful sound, but it should be at least 1/6th of the vibrating length in the ADG
2) Ebony - Rosewood - Boxwood from the bass side to the treble side of the spectrum. Sometimes. But as you said, the weight and dimensions, and the actual position of the tailpiece could be more important.

P.S.
I changed the hardware of my main instrument twice this year settling to ebony. It's a lot heavier than boxwood, but I like the sound. For now. hehe.

P.S. no2 I just noticed that you mentioned the end button. This could prove tricky, nothing is more annoying than a non fitting end button. So just make sure you have the proper tapering tools (or a local luthier) just in case.