I didn't have any changes during the comic updates, but while I was drawing buffer someone gave tips on drawing undercut haircuts and I ran back to fix it before it went up.
I'm still behind on proportions and perspective so I like having some ground to stand on by having the character have few outfits (and probably related - they remove a big jacket, or formal wear that has a similar palette to their casual wear, etc) that I know from the inside out. Ref sheets would be ideal but time is pretty short. However, that doesn't mean that you shouldn't change, especially as you add things to your character that make them feel even better to write/draw about, and gain skills in drawing more detailed or different types of designs!