WDVS offset in insulation - approach?

Maybe you can help me.

The grey areas are to be provided with a recess in the insulation.
White areas 16 cm insulation WDVS
Grey areas 14 cm insulation

This creates a drip edge on the 1st floor.
The plan is that the window sills made of aluminum between the window sills on the masonry are simply extended in this area. One window sill would even have to be installed around the corner of the house. I have doubts whether this approach is correct?
Does anyone have expertise?

Of course, there are also opinions saying why don’t we simply run the 16 cm insulation through and, for example, use a different plaster. We also find the architect’s idea visually appealing.
With a 2 cm difference, for example, it is said that very precise work is required, otherwise it will look uneven.
In the basement, the offset is technically no problem.

Hello Bertie

I am a layperson and have no experience with this type of execution. Visually, I like it very much. But did the architect explain whether he has already implemented something like this? If so, has it been operating without damage for several years?

Otherwise, despite all affinity for design, I would avoid something like this. If dirt later accumulates there or there are streaks on the facade? Then the trouble and disappointment are great. And the rework costs money at first.

Better to keep it uniform or use another plaster. It would not be worth the risk for me.

Many greetings! mini

Do it over the plaster. You won't get the precision with the insulation boards. All the corners and edges require rails. A 2cm offset and a windowsill underneath is also more wishful thinking.

Putting aside the fact that from a few meters distance you can hardly perceive it anymore, this "gimmick" I would paint differently or have the area felt instead, so that it stands out not only visually