I am having low frames as well at arrival airport after the last update with the PMDG 737. it seems now that CPU has more load. Before the update i can flew smooth with LOD 200 and OLD 165 + PMDG 737 at default airports. Now i still having low fps with LOD 100 and OLD 100 + PMDG 737.
Take off at MMBT:
Landing at MMBT:
Regards