Welds look perfect (for what it is) to me. These frames are mass produced as cheaply as possible so proper welding technique dictates that you use a bit more filler to account for any irregularities due to haste. This ensures a strong durable weld. While it would be nice if every frame had Moots-type quality welds, the added labor would really jack up the price. The leader frame is a great frame because you get a strong-reasonably high quality frame for little money with the only concession being the superficial neatness of the welds.
If this frame suited my needs it would be at the top of a list with other, more expensive frames. Unfortunately, it doesn't have the features I require.