Believe it or not even though I ranted in my previous post how every changeling is just some mindless, feral, drone there are some different types of changelings in the hive who serve different functions but that’s because they were breed that way not by their own choice.
So anyway here we have the 3 types of changelings that function in the hiveThe Common workers descend either upon a settlement or maintain their hive.The warriors that are bred for heavy duty front line fighting. (they resemble attack doberman)And lastly the brooders who watch and care for the young. Probably the less dangerous job of the two, but don’t be fooled they deal with energetic monsters all day long and could still kick yer pony hide.
After Thorax's ascension and queenhood and blah blah share love blah. Anyway the hive changes a bit. With workers now considered to be citizens who are independent of their own thoughts, jobs and passion. A citizen (should they wish to reside in the kingdom) are now able to pursue their own needs (whether that be an architect, gov. official, craftsmen or artist)
Citizens can also become Guards and Mothers but that is a more rigorous process as those two roles are vitally important to the hive.
Notes on reformed- changelings
Although the hive roles may not look that different from the previous hive, ponies must understand that changelings are still learning how to engage in their new environment. It's gonna take awhile before they hive becomes a fully functioning kingdom. Luckily Celestia has granted their land to be an independent city-state and over a period of 100 years they will have the option to secede from her kingdom.
Hopefully in the future their economy can be more of a capitalist, parliament society but for now the hive works as an absolute monarchy.
Nowadays changelings are now able to pick their own fate. There has been a recent metamorphosis of individuals either lacking a horn or wings or both. Three distinct races are starting to pop up as citizens are learning what communities they fit into more.
Some researchers theorize that because changelings have heard from Queen Thorax’s stories on how the ponies of equestria have inspired Thorax to open this eyes about a new way of existing many changelings are now fascinated by ponies and how they live and are curiously copying many of their mannerisms and trends. Although in the show changelings seem to do a 180 on their appearance I headcanon that it takes a while for changelings to experiment more about their self-expression for now the older changelings all simply have a base color of black, or gray and two fun colors on top of that. And a lot of changelings are inspired by the lustrous Queen’s color palette. However many younger changelings are starting to experiment more vigorously about their self expression and are starting to resemble themselves closer to birds of paradise then changelings. XD
One last note the mother is just a nicer way of saying brooders and changelings don't have to be explicitly female or male (if it wasn’t portrayed earlier changelings don't really have a binary gender)it's just a term they heard ponies use and they copied it.