So since the Acrobat package is large, fortunately, i've only been using a "patch" that does nothing but check to see if the applicability and installed rules are working.
Also, what I didn't make clear was that I do actually have 2 separate packages.
One simply does the upgrade to v11 that includes the patch to 11.0.6, and the other is just the patch for those with older versions of 11.
The problem I was seeing is that because the applicability and installed rules weren't working right, those with v10 were getting the patch for v11, and those who just needed the patch were getting the whole v11 package.
Anyway, I think I figured out a set that worked.
Hopefully, someone else will find value, but holy c*r*a*p what a pain.
(So much easier when you just took the ruleset provided, added the install package, and published the package.)
For v11 Full
Applicability: MSI Product Installed Rule (Not)
ProductCode={AC76BA86-1033-FFFF-7760-000000000006}
Installed: Reg DWORD Value
Registry Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{AC76BA86-1033-FFFF-7760-000000000006}
Registry Value: VersionMajor (enable 32-bit)
Comparison: GreaterThanOrEqualTo
DWORD Value: 11
For v11 Patch
Applicability: Reg DWORD Value
Registry Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{AC76BA86-1033-FFFF-7760-000000000006}
Registry Value: VersionMajor (enable 32-bit)
Comparison: GreaterThanOrEqualTo
DWORD Value: 11
Installed: Registry String Value
Registry Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{AC76BA86-1033-FFFF-7760-000000000006}
Registry Value: DisplayVersion (enable 32-bit)
Comparison: GreaterThanOrEqualTo
DWORD Value: 11.0.06