I'm not sure - the only problem I have had with a freeze and/or CTD connected with loading battles in regard to vegetation was when I lacked some of the generated .vege files. You should have 43 of them in your eb data / vegetation folder.
But if it's specific to your pc then maybe it is connected to the video card settings / EB staff will I'm sure be able to help you better than myself as I'm no techie.
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