i use sewist - which i don't realy like but i don't want to be confused with underground waste water channels.
Seamstress? seems like an actual trained job to me and should only be used by those who have earned it, IMO.
I don't mind drag being involved or cosplayers or men, or elderly women, or young women or whatever. What i want are competent sewists who can put in a zip, make a proper welted pocket, know about facings, have an eye for colour and know how to select a fabric that is appropriate to the task.
I want challenges that show these skills (pattern challenges that don't give a finished garment that can be worn (those canvas shoes a year or two ago) are rubbish. A skirt with pockets and a zip and a waistband would be good. etc
I've said my piece about the transformation challenge.
m2m. I want making and i want measuring. And i want them to demonstrate good skills, good finishing and good fabric selection. Two m2m featuring draping within weeks, especially when that's a type of sewing that isn't really within the remit of home sewists generally.
I do like a good theme week though. the Indian one was great. Children's week is always fun, and i think swimwear or underwear in the latter stages really sorts the wheat from the chaff.