With everythiing else being equal, a long-arm rides better on the street when compared to a short-arm at steeper angles. COG wise, they give the same COG as a short-arm does when everything else is the same, no difference. And a long-arm doesn't require a SYE any more than a short-arm lift does either, everything else including the lift height being equal.
For most wheeling, my long arm suspension from RE performs exceptionally well. Its only real issue is that the added control arm length & exposure means the control arms can get hung up on some trails more easily. If I'm on an extremely difficult rock crawling trail like out in Johnson Valley, my long arms give me fits as I get hung up more than I like... much to the enjoyment of my buddies who aren't all that impressed with long arm suspensions.
The two below pics show two of the several locations my long arms got hung up on that day on Sunbonnet in Johnson Valley. That second pic/poster was done by a buddy who loves to give me crap over my long arms.