I've been hard at work of the last few weeks trying to beef up the SFTP dialogs to handle large numbers of files. Boy was it a mess. Not only did it take a long time to process the directory listings, but the app would appear to hang while it was doing it. I've put a lot of work into making the SFTP dialog much more forgiving and responsive, regardless of how large the directories are. I've tested it with tens of thousands of files, and it still works well.
I've posted the new version to the beta group. Please join in there to get the new version and join in the conversation: