Following my issues with ClimateControl, I am now using BiomeTweaker. The developer is very active and kindly implemented a feature the day after I asked (foliage/grass colour). I really used to like ClimateControl but since it isn't developed as much switching over to this new tool was definitely the best route for me.
Looks good, will definitely check out. Would like to see ClimateControl work out though, it does have increased performance going for it, although that's not my entire focus.