I thoroughly enjoyed this game, not only is it cozy and pleasant to look at but the premise is super appealing. I love the fabrics at hand however id love to see more vibrant nd variant within the colours available (personally id prefer the colours over patterns but they're always a plus).
id love to also see character relationship status (and maybe in the far future something to do with that status - for example maybe giving a discount on outfits). and as much as i love making gorgeous dresses id love to see some male customers and male outfits (especially a waist coat).
i understand at this time theres limited components to the game however i think the option to refuse or haggle prices could be interesting and then once they've seen the final piece and aren't happy with it they ask for a refund or price deduction or something which adds an element of risk so the player has to ensure they have enough funds in at all times rather than just spending it all on materials.
other honorable mentions/ideas: maybe the characters could bring you the material with a rough sketch/area marked out in your pattern process that indicates where they want it specifically so you have to manage that fabric to fit it all on as that's all you have (because they brought it in themselves)