We are now having magnificient sceneries built for FSX. YVR is one of them. Two other ones are EFHK and EDDL by Aerosoft. They both had major OOM errors on initial release. Aerosoft created patches for both sceneries within a month of release that addressed both issues. I am sure the boys at FSDT are aware of that.
Those scenery were probably bugged, like having a problem with some objects, this means they could be patched.
There are NO problems in CYVR, what causes OOM is NOT CYVR, is the fact you are insisting using it with TOO MANY OTHER THINGS.
FSX HAS a 4GB memory limit, CYVR it's just another thing that CONTRIBUTES, together with all the other things you installed in your system, to reach this limit. You just can't add and add things, and expect everything will continue to work.
As explained, several times already, you have several options:
1) Don't use it with so many add-ons
OR
2) Turn Off HD Textures
OR
3) Use DirectX 10
As explained, several times already too, the scenery has been tested to take about 3GB with the following add-ons installed: PMDG737 NGX + UT2 + FTX PNW. This should leave you with about 1GB spare. That's to dispel the idea that "CYVR could only be used with default stuff", because it's simply not true.
Even with all the above add-ons, you should still have about 1GB left. If you are using it with additional things, and reach the dreaded 4GB, FSX WILL crash, without this having anything to do with CYVR, and without we could do anything to "fix" this, since there's nothing to fix.
And of course, of the add-ons mentioned, CYVR is not even the one taking more RAM.
FSDT should create a patch that will reduce memory requirements - even if it means reducing the quality of the scenery.
The memory-reducing option that reduce the scenery quality it's already there without doing any patch: Turn OFF HD Texture, that will lower memory requirements, at the expense of some quality.
There are people who refuse to use DX10 and also refuse to tone down the ORBX FSX settings for PNW. There are also great high-def textures by McPhat that require 4096 textures.
So, by which rule, you are deciding that we should "reduce" our scenery quality (which you can do it anyway, turning off HD textures) but you "refuse" to tone down Orbx and McPhat textures ?? That doesn't make any sense.