His HT should be fine, have several of his, no issues. If you're curious, you can do an acid dip and see where the hamon lines run. Now, regarding the edge: The helpers are the ones who put the final polish on the blades. If they get carried away, since the blades come with a fairly fine edge, that tiny little strip of metal can lose its HT and be a bit softer. That's why it feels sharp when it comes, but then those random mini dings appear. Does that make sense? The "good" HT is on the inside, and the very edge is a bit softer. One sharpening session should be all that's needed to get down to the "good" steel. Just use it, use the charda to steel the edge back in line, and when you get time sit down and sharpen her up. That soft outer edge should peel right off, leaving the solid stuff.