I have created I think 130 something families some I play and some I don't. Some are the altered townies and some are just my own creations. I have noticed that the altered townies and my Sims are used for certain roles like landlords and vendors, mail men etc. But there seems to be something wrong with the Mixologist. Not only can't you alter the Mixologist because they lose their title and are replaced but they constantly change shifts (they are not on a normal shift rotation, they rotate constantly and I rarely see the same one). One club for one night generate 5 or more Mixologists because they only stay at the bar for a very short time frame. So I think some of the excessive generation is because of a glitch in that and possibly other positions where their shifts are set too short (better to set them like a full time job and assign each Mixologist a specific shift so they are working the same time every night), the turnover rate is just too high. I think the game should actually let us design our own Utility workers if we choose. Right now they have My Households and Other Households I think they should add a Utility Worker category where the game presets the necessary skils and requirements so that they can fulfill those roles but that you can alter their appearance and name (sometimes the names are insane and there are a lot of repeated names) if you choose without causing issues. I also think if you marry the Mixologist say they should keep their career and their skills unless you choose to quit their job on adding them to the family.
So I have been thinking the issue might be that Mixology is not a proper career, so Sims can't actually be assigned they can only moonlight which is probably why the game has to generate so many because they literally only perform the task for a very brief time, not like a proper 8 hour job. If they change that alone that would cut down on the massive amount of game generated Sims.
