If you are on short final , and on one side of you is a lot of detailed Scenery being displayed which you are looking at, the System will struggle to display it...
...on the other side with very little detail, you wont have a problem when you look at it.
Complex scenery being displayed on your monitor will always drag the response of your display down!
I make the choice...fly into complex Airports and accept the lag...
...or go and fly somewhere else...

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I installed a lot of complex add-on scenery at Santa Barbara and Paso Robles which reduces my Frame rate almost to a crawl as I approach....but I put up with it for the sake of the nice scenery!
Paul...G-BPLF...FS 2004....

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P.S....If your Frame rate is set to "Unlimited", lock it a t 20/25 FPS Max....and see what happens...

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For Multiplayer it has to be locked at 20 FPS for smooth flights for all!...

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Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.