Dont see how selecting a table from the drop down for 2 seconds to refresh metadata is such an issue. But I do see you driving traffic to SSISJunkies.

Think...

There really is no such thing as a big no no if you know what you are doing.

I disagree with your suggestion. When you select a table from the...

Check the isolation level of your package and your data flow. Serializable will lock the rows queried.