I think there should be a store that sells convenience TFs that, instead of completely changing the PC's whole body with a normal TF, would allow him/her to change specifics of the body like height, eye color, skin etc. and even have certain parts from other TFs in it too. Ultimately, this would cut down on the amount of time save scumming for a specific part(s) without ruining the entire body with one you don't want and starting over. Because of these TFs changing and/or adding a specific part instead of a full body, the TFs would be quite expensive but less time consuming in the long run.