Please accept my belated Season Greetings!
In regards to why the custom workflow option is available in the standard edition - this is an omission on our part and this will no longer be the case with the next release.
Having a 4-eye workflow is logged to the list of tasks to consider for future implementations in workflow. I have brought it to the attention of decision makers in the team.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items