As mentioned here, R9 and D7 after R8 creates a voltage divider that reduces the maximum amplitude at the output to something like 6 V, which may not be enough to fully open some VCAs or VCFs. I think most Eurorack EGs put out something more like 8 to 10 V. If you move R9 and D7 to before R8 then the maximum output should be in something more like the 9 V range.
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