After some hunting I found that modification of an AutoDeploy rule wasn’t as simple as Edit-DeployRule  🙂  My coworker Joe Keegan, the God of AutoDeploy walked me through the simple steps to modify existing rules rather that deleting and replacing.
NOTE: Â You do NOT need to use “” or other characters around the <VALUE> EXCEPT for the Pattern Value. Â Otherwise, the object is found when it checks the name against the GetType.
To replace the Pattern of an existing rule:
Get-DeployRule -name <RULENAME> | Copy-DeployRule -ReplacePattern “<NEW PATTERN>”
To replace the Image, Location, or Profile of an existing rule:
Get-DeployRule -name <RULENAME> | Copy-DeployRule -ReplaceItem <NEW PROFILE NAME>