This is repeat of what I previously posted in some other threads. That annoying habit of wing flipping when you don't want it to, also generally means that the wing will roll over much easier when you are tacking. I always find it strange that hardly only one ever mentions that point

. I tack constantly during a session; toeside, heel side, handle-pass-behind-back. The tighter your turn the more you want the wing to readily rollover on its own without having to help it with a free hand during the tack. With a handle pass tack you don't even have a free hand to help roll the wing, so it better have some decent roll properties or you'll get frustrated quickly. I also like continue a jibe or a tack right into an immediate 360 (different from a backwinded 360) and having that built-in roll ability helps tremendously along with a "no-think" SLS boom re-grab since you are releasing and re-grabbing the boom very quickly on those types of 360's.
I think it also helps with Heineken jibes or just flipping the wing from backwinded riding stance over to toeside riding stance. Right now I'm working on flipping the wing in reverse; from a toeside stance to a backwinded stance then going right into a jibe. To me the whole idea of a boom wing is to be really good at freestyle moves as opposed to flagged out wave/bump riding. I'm actually a bit surprised they didn't make the new Units more roll (flip) resistant compared to the SLS Slicks.
If all you want to do is jibe and flag out the wing on waves/bumps then by all means stick to handle type wave wing that doesn't want to roll...or flip quite as easily.