So since the playerbase seems to be split almost fifty fifty on this topic, those who are saying no are simply saying it because they do not wanna look like something they did not have a say in choosing themselves. What if we get to choose 2 looks at the same time, one for the classic models and one for the modern models at the same time?
This system is already in place and there is no need to spend any resources on it by the dev team other than making some tweaks to it. We see it when creating a Worgen/Human combination.
Would you guys like to have this feature implemented on classic character creation at the start of classic? They still have time to squeeze this in.