datastay,
There are a lot of features in MyEclipse and not every feature gets touched with every release (although UML did get upgrades/fixes in some other areas in the 5.5 and 6.0 release, just not the one you were looking for). The UML functionality is being evaluated very closely in unison with user requests to determine the work that needs to get done moving forward. I don’t have more details for you right now, but we understand UML is critical to a lot of folks and need to provide a comprehensive tool to them.
Also, if you upgraded to Pro for UML and are not satisfied you can email subscriptions@genuitec.com and they should be able to refund you the Pro upgrade cost. I don’t want anyone unhappy with their purchase.