This is a much needed feature as there is no plugin currently which support creating templates and allow a user to use local build and post-build steps. EZ-templates plugin provide an excellent way to have local parameters but sometimes it is much needed to have local post build steps. For e.g. i want my junittestresults to generate only for one job post build and not for others or have email templates configured differently for a job than others.
I was just googling for this feature and arrived here. What I don't see in these comments is a reason for not having the whole "Build" section in the "Features exempted from templating" area. This would be a good starting compromise, it should be really easy to add (just like there is already exemptions for job parameters, build triggers, etc.) and would have allowed using this plugin at all when the build steps must differ between jobs.