Mattel has started to figure out the female sculpt for the DCU figures and put out some damn good figures in that line. Granted the MOTUC line is a lot more detailed and has a lot more of accessories sculpted on their outfits but I really think they need to start from scratch to create a new buck that takes care of these issues, definitely sooner than later. If they can get a new buck to use for some new female characters, once they get the new buck figured out and any problems addressed then we can see a release of an improved Teela, Evil Lyn, Goddess, She-Ra, etc. and hopefully by then they'll have a better idea on how to address the decorative piece problem you proposed.
I think if we don't see a new one relatively soon, we won't for the rest of the line. If we really get 4 new female figures in 2011 using the same female buck we have now, we won't get a new buck imo. They'll give us the excuse that they want all the female figures to fit together in the line.