through extensive testing and sifting through various aspects, this is a general tip for the community.
a recent discovery of a memory leak - Definite memory leak
has been almost assured been tied to Ai/Live Traffic - Please "destroy" out of range (FLYING) AI Aircraft - that are causing FPS decrease, (and eventually CTD ? )
If anyone is having issues with FPS Drop and Memory usage surging, disable AI/Live Air and Ground Traffic.
so far, in the big mem leak topic and a few other topics we have narrowed it down to the AI Air Traffic and possibly Ground Traffic.
we are hoping that Asobo looks at this information that many of us have submitted to them via Zendesk and this will be included as a fix in the near future.