Great addition to the latest patch showing icons for settlement and specialist increases.
I guess the icon usage can be taken even further with e. g. the following:
* Icon for an attribute point increase
* Icon for an increase in culture or science. Maybe a separate icon for each
* Icon for an increase in food, production, gold or happiness. Maybe the icon could be different for each increase type similar to what you see on the map. Corn for food, hammer for production, coin for gold and smiley for happiness
* Icon for an increase in unit strength. Maybe a separate icon for each unit type. E. g. a foot solder for infantry units, horse for cavalry units, ship for naval units, gun for ranged units and fighter for air units.
If you get multiple bonuses then maybe a big plus icon or a double / triple plus icon can be shown.
With such icons you can easily glance at the tech or civic tree to see what kind of bonus you will get similar to the base game feather pen icon for a new social policy and now the settlement limit and specialist increase.