Well, I don't know what numbers Peterpan is looking at but that certainly looks like Touring geometry to me.
My Basso Loto (62 cm) has a head angle of 74 degrees and people always told me that it would be squirelly. In fact it is the steadiest bike I have. So I wouldn't worry about 73.5.
The fact is that I would expect a 62 Touring bike to have a 57 cm top tube. With a 59 you'll have to use a short stem in order to get the more upright posture of a touring setup. That's probably better anyway since it gives the steering a more solid feel. Those are the sort of selections a frame builder like Lyon makes using his experience and that of others who have used his products.
GVH is and always has been a very competent and honest company to do business with. I doubt that anything has changed with the death of Gary Hobbs. I recommend them as I have for several years.