Patches in the form of .Msi or .exe. or .sh
Currently there are a lot of manual steps that are needed to install a patch and chances of missing steps due to human error is possible. The EXE or MSI or .shshould take care of all the manual steps needed to install.
Also there should be silent install available which can be used with the MSI or EXE or .SH to install the product silently.