Actually, tip weight is still an important component in the trim process, one of the first things you do. The first test of the trim on a new ship is whether it flies wings level, upright and inverted. That is adjusted by tip weight and tweeking the flaps for roll adjustment. A stunter that rolls in or out in manuevers is a scary thing to fly.

The jury is still out on unequal wing panels. I think from my study of the subject, that most newer designs have equal panels, or if they are offset, it is only a little, maybe 3/8 inch.

Have a look at 2bflyinging's thread on adjustable flaps and elevators for a link to the Paul Walker trim flow chart. Paul won the Nationals in CLPA 5 times running, plus one World Champs, so he's likely a pretty good resource. RW and I have been having a running conversation on this very subject. Welcome aboard!
Kelvin