Not sure how I should feel about builders. The problem in civ 5 with workers was that in the early game was ok to move them to improve plots - there were decisions to make which had impact on how the early empire growed. After a while tho, especially when waging a war, managing workers was becoming a burden - not a fun stuff to do. The decision aspect had no longer much of an impact on how the empire doing. So I had hope firaxis will get rid of workers all together and replace them with some public works mechanic. Turned out we have some hybrid mechanic which we yet to see if it adresses and solvers problems workers had. Im optimistic, I will give warm welcome to anything which will replace workers.