When creating an issue, clicking on the "Epic Link" chooser is apparently trying to return the 100,000+ Epics in our organization.  It takes about 50 seconds to return and the suggestion results are not very good.  Our corporate support staff say there's no way to improve this behavior in the product. 

There should be some strategy(ies) to return more relevant suggestions in a faster fashion (for example most recent Epics related to that project).