Regarding that topic I might just say it out in the names of the development and the fellow leadership:
The current script are not going to be modified or fixed. They will stay on 0.1 T3, until we release RS:IV 2.0. The reason is simple and was mentioned many times... The scripts are quiet messed due to the past amount of scripters, which makes a fix or modification of it quiet impossible.
Therefore you should not wonder that there won't be a public, stable or recommended Rock Stars IV built on 0.1 RC2 yet
Though we are trying out best to get to a release date as soon as possible.