different figures have different character that goes deeper than how many dials you spin.  If the cost of entry for a figure is reasonable enough, people can use whichever figure fits the clothes that they like the best.  

For example. AS made some awesome stuff for v3, then v4 came out and they made some more awesome stuff for v4.  If I want to use their v3 stuff, I can try and convert it to v4 and it might be workable or it might not.  But I can still use it fine on v3 and I do.   

Even if I could make Antonia look basicly like Anastasia they'd still be different figures and working wiht them would still be a different experience both as an end user and a content creator.  

None of that is bad.  The hope is that with more than one figure, content creators wont be forced to work with one and only whether they like it or not.  It gives them options.  Sure v4 may still end up being the most profitable to make for, but creators will see opportunity in under served figures.  Hopefully they will see opportunity in that v4 production has moved more into the lines of variations on already explored themes, whereas they may look at Antonia or Anastasia and see that there isnt for instance a great sci fi set. (Just an example I'm not fully sure what sci fi options are available so its not a comment on any possibly existing set)  Sales requires a need that needs filling.  There is more opportunity in a multitude of figures than there is in the one and only rut that we have been accustomed to for so long.