Using one single tree model really breaks the organic look of the environment...
And the earlier versions with wacky colored trees didnt do much for me either. Original 2D/Y mesh look better im afraid.
I suggest you take the time on your projects and give them way more effort, because this is what's achievable:
View attachment 672483
6 tree models, with proper LODs, single textures (bark and leaves in one), tight LOD distances and forced billboards for everything after the first row or 2. Wasnt quick... thats for sure.