As much as I'd prefer old face, choosing to support both art styles would be really poor decision.
It would unnecessarily increase complexity of the code, increase development time, increase time of fixing future problems or adding new features, and add new bugs (since code became more complex). Furthermore, it would be either extremely hard or impossible to make cimpatibility code that adapt old layering to new without redrawing old layers. And if you want to redraw them, artist workload would also increase.
For me it would be way more rediculous if they have actually decided to implement that toggle with the team of two people. Let's go, +1 year ETA!