Adjusting settings is not solving the problem, but a workaround.
Adjusting setting, instead, it's the only correct way to solve the problem.
Since this happens only at LSZH, and not at e.g. EHAM, KLAX and KDCA, this must be a problem related to this specific scenery
That's a comparison that doesn't have much use because this scenery is not located in the EHAM, KLAX, or KDCA area.
What you see on screen, it's not just the airport scenery. It's a *combination* of the background of the area involved (with all your other eventual addons, like meshes, scenery, ai traffic, etc), plus the airport. With the wrong (or too high) settings, the *combination* that happens in this area might require different settings than at other places.
A question: do you have FSX ? Does it happens in the FSX version ? Because, that one has an entirely different way of loading the scenery.
The most important setting is probably the global texture size, because this scenery has much more ground resolution that the others you mentioned. The global setting size is there for a reason. One notch below maximum, it will use 512x512 texture size, hence reducing 4 times the amount of VRAM requested, just like the initial 1.0 release. The slider at the maximum setting will allow 1024x1024 textures, showing the full resolution of Zurich 1.1 and above. It wouldn't make much sense to publish two different version of the scenery, when you can obtain the same result by simply adjusting a slider.
Please solve this problem, because I have many other addon airports, and LSZH is the only airport experiencing stutters on short final.
I've just tried two approaches, one in the default Baron and another in the default 747, haven't found any stuttering problems. FS9 freshly installed without any other addons, all sliders to the right. Maybe with many heavy load airplanes (like the pmdg 747, only that one takes more than 600MB of ram), or traffic addons, one would have to play with settings more. That's why we have a Trial version, so anyone can try on his *own* combination of addons and PC config.