I would like to be able to control when my batch tasks are run in my post-build
actions, specifically i want to be able to decide whether to run a task
regardless of build outcome (the current functionality) or whether a task should
only be run if the build was successful or a failure.

See this forum post for other interested parties:
http://www.nabble.com/Batch-Task-Plugin---executing-tasks-for-successful-builds.-tt16566711.html#a16566711