I fully understand what you're going for with rubber bushings instead of rose joints and polybushes. I stuck with hardened rubber bushes for my skyline and it drove amazingly!
Rose joints are a dose alright. I polybushed before but will just go with rubber bushes in future. The little bit of flex is more of a help than a hinderance. I do have rose jointed arms and they need replacing every 2 years or so with daily driving.