Hi Jin-Chong,
I did open an SAP incident as Pranay suggested, but the same results were see - no performance improvement on Patch 2 for us. I even applied it in a sandbox environment myself just so we could test some additional reports as well. No luck. I know others who have seen performance improvements, running in a similar environment and with similar sized reports, so I am really not sure what to make of it.
Thanks,
Missy