Do we need to install regions for airports?

Can we make these airports depended on region work without regions? (an Oxymoron?) 

IF you have Global, why can't we add those airports... Regions seem to be performance sucking items. I unchecked (Active=FALSE) the region and the airports lost their buildings 

Anyway to get around this?

I prefer Megascenery for California.  With all those airports I have for CA (FSDT KLAX, LAtin VFR San Diego, Orange xountry, FB's KSFO)  Megascenarry helps with FPS.   I don't want to add CA Regions just for a couple  of Orbx Airports.  I prefer Orbx KPSP since that doesn't depend on Orbx region.

Orbx is good for small GA aircrafts (that doesn't consume FPS) but for airliners I am losing interest in Orbx... So I am thinking of restricting Orbx to  PNW and few standalone orbx like KPSP and Sedona. 

Remove my Australia and not buy anymore Orbx unless they are standalone like Sedona and Palmsprings.  (I prefer Photoscenery and UK2000) for UK... not Orbx.