@Gabor - I probably didn't make myself clear enough. There are two schools of making those joints - following the panel lines and avoiding them. It's nothing new. Many, including me, were in favor of avoiding existing panel lines as it usually ended up in uneven panel line thickness or issues with rescribing. But that seems to be changing now with precision tooling, where on examples I have mentioned previously (especially Tamiya Spit, Eduard did it right on the wing of MiG-21 but failed somewhere else), it was possible to create a joint which follows the existing panel lines and has the same thickness, depth while keeping the same surface hight as the rest of the model.
What I am seeing here is relatively thick spar and even if they tried to avoid certain surface details, it will be an uneasy task to keep or restore the surface detail. Still, I am pretty sure it was a safe decision as they were aware of the limitations of the their tooling. Which is fine.