Y...e...s... I'm not sure about it, but the only noticeable change (other than the ones I made in CAS) are the traits; A huuuge pop-up shows up on the upper-right corner when you change the lifestage of the sim. For example, when you change a YA/Adult/Elder sim back to Toddler, the pop-up shows you all the traits that became unavailable in the change, and there are lots of traits...
Other than that, nothing disturbing was taken notice of.