I've been playing for over 100 hours now and I have Yet to have one of my villagers achieve "master builder" status. My population is currently 30 and three huts have been built. I say that building is unbalanced because there are (compared to science and farming) limited opportunities for advancement. Once the huts are completed, they can be "fixed" but I've already spent HOURS fixing them with my one and only builder. (I figured fewer builders might translate into faster advancement! --WRONG!)

I initially had 2 villagers focused on building but they got old, unhealthy and one of them died. I picked an 18 year old male (females don't make good builders because of breeding and taking 2 years off raising rug-rats) and nagged him to build the 3rd hut thinking that if he built the entire hut himself, he could reach Master level. I shut the program down (without pausing) and when I checked on them the next morning, the hut was built and my now 25 year old builder was still Adept. I'm now throwing him on huts at every opportunity to "fix", hoping that he will somehow reach Master level.

I don't know how this problem can be addressed. The scientists can research and the farmers can harvest/fish/forage ad infinitum but the builders are limited on opportunities. Maybe create a "station" where the villagers can do wood-working hobbies or something.