Actually, the finger barrel bushing was introduced by Colt to improve accuracy.
Which, mebbe it did.
At least, until it broke one of the fingers off.
At which point, ANY accuracy was no longer obtainable.
I bought my Gold Cup in 1979. I Ransom Rested it with several other Colts, all Government Models, from the same general era. The Gold Cup wasn't appreciably any more accurate than the Gov't Models, statistically, when shot from the rest. It was easier to shoot well hand-held, though, probably due to the much better trigger and big, blocky, easy-to-line-up sights.
At the time, the magazine article rumor mill said that the Gold Cup sights would eventually fall off, the front from a too-small tenon that wouldn't hold the too-small crimp and the rear sight from the hollow roll pin holding it in place. 35-plus years later, I am still waiting for them to fall off. Yes, they COUD, and some did, but a statistical analysis of probability with a sample size of one gun is meaningless.