Thank you so much!
Sitting animations will come in the Daily Life Animation Update! Currently working on Battle animations, so it may still be awhile before I start the next animation pack.
I do want a secondary color selector! No ETA on that but it will probably come in the next customization update. I am currently swamped with work, so I haven't been able to work much on either update but I am hoping to have something ready in a month or so.