Thanks Tony. The frame rate is ok, maybe slightly better than before, but the loading time is exactly as twice. Could it be I had no smart exclusions before and now with them enabled things have got worse? 
Edit: did a test on my SSD (default Cessna XP10.36, objects mega tons, streets tons) 
Previous hd config (no autogen=Simheaven xd format) EDDF loads in 4.20 mins 
Actual Simheaven EDDF loads in 7.10 mins