It means we will be back to a cleaner version and it will make life much easier in future regards future development.Think of it like this.You build a house and permanently concrete over all the pipes and cables etc and then you have a leak or an electrical fault but now you have to go break a floor or wall just to get to the issue if you can even find out where the problem is in the first place.This is how things were with XBC because not only were we drifting so far away from bitcoins codebase with many different parts and when you had to change something it would have almost made sense to start all over again but this time we have already stripped things back to the beginning with a whole new foundation and when we are building the floor,walls and putting on the roof we will make access points for maintainance and plenty of connector boxes,terminals etc for monitoring performance and adding more cables etc if we build on an extension to our shack.
Thats the easiest way to put it.

~plusbus