I have a locked 70fps and I haven't noticed any dips, but one friend of mine mentioned that he is having dips below 60 in idyllshire, especially near rowenas place.
Should try to unlock the framerate and see if I can notice it that way.
I usually run games at higher framerates, but with MMO's resort to 70-80 most times.
Could be that idyllshire currently renders objects that are not even close to your line of sight after the changes and updates. That is just a wild guess though. Try to find that setting that forces it to avoid rendering things that are out of your sight. I think there was a setting like that, change that setting and see if it helps.
Should add the obvious thing. Try updating your drivers.

Incase it makes a difference.
GTX1070
i7 6700k@4.0ghz
16gb of DDR4 ram
and a 144hz G-sync monitor (relevant because I don't need to use vsync with that).