It looks like the big problem for Orbx centers around ObjectFlow 2.
So as of Saturday August 5th, you can opt in for ObjectFlow 2 open beta.
It's super simple AND you immediately get all of the Orbx airports that you've bought.
Read it here - ObjectFlow 2 Open Beta
What I found is that, in my opinion, the scenery needs a little makeover. It IS exactly the same as you've seen in P3d V3.X, but I think that it can be better than that, good as it is.
The process is very quick because most of what goes on is copping the scenery from P3d V3.
I didn't notice any slowdown in FPS.
It's free, go for it.