Silverfox - I can't speak to FTM2014, because I have not "yet" moved from 2012.
Any attempt to do anything in FTM is so slow that I can't imagine how you accomplish anything. I stick to doing everything I possibly can from the online ancestry tree, to keep from going stark raving mad from the boredom of waiting for FTM to complete.
This morning I deleted 6 unattached media/source items from the FTM side, since I can't do that from AMT side. I had made no other changes/deletions/additions. The sync took nearly 2 hours. My usual sync, after many changes/additions/deletions from the AMT side, takes about 15-30 minutes.
I know that was not your post/question. Just reporting my experience.