A bonus I had suggested for Dravidians has formed the core of Armenian eco bonus and balance. Look at this post from long before ‘Mountain royals’ was released.
The devs tried to be cute and reduced the value to 25% for mule cart technologies for Armenians. The effect was too small to have any practical use. With update 99311, they had to increase it to 40% and remove two-man saw just like I had suggested.
The Dravidians wood bonus is poorly designed. It is only useful in feudal age when wood is important. In castle and imperial age, it just adds to the stockpile or is not even enough to build a new town-center. The best replacement suggestions for that bonus I have seen are:
and
either of the above bonus can be paired with the Towncenter workrate area effect bonus.