Probably the last update on the whole 2015 Leader 725 ordeal:

The replacement frame came today, after I was denied a replacement/warranty because I was told the frame I received was acceptable (see page 357 for story). It was only until I found a divot in the bottom bracket shell, that they sent me another frame. The frame I received appears to be structurally sound. However, there are still welding imperfections, and a tooth-sized piece is missing from the welding from where the top tube and down tube connect to the head tube. I doubt I'll be able to get another replacement, as it took an insane amount of effort to even get this one. Pictures are attached: Head tube weld , and Brake bridge weld

tl;dr: Hassle to get a replacement frame, even when I sent pictures of welding imperfections. Finally got it replaced because part of the BB was melted off. New frame comes, structurally sound but cosmetically even uglier. I've had Leader frames before (2007 735TR and 2010 725) and none have had this problem.