I, for one, have never made use of the Profile Customisation option, nor have I seen the necessity for it, so I wouldn't mind if it was dropped for something new.
On a side note:
While some people have made pieces of art out of their profiles, there sadly are some others, who used the profile customisation to make it as painful as possible to look at their profiles. Dropping those would definitely be good riddance.
Die Wahrheit ist so schlicht und schön: Es kann nur in eine Richtung gehen. Es gibt nur einen Weg zu dir, er führt tiefer hinab!