My personal viewpoint after riding the Bleriot for about 6 years:
Unloaded the tubing seemed too stout to really plane for my 190/200lb body. Always felt a bit stiff/heavy for long rides where I wanted a more sprightly feeling.
Lightly loaded it felt better. Honestly the photos from that tour were about the best the bike ever felt. With a mildly loaded handlebar bag/rack/decaileur, I always got shimmy. I never swapped headsets from the FSA I put on there originally, so it could have been as easy as a needle bearing headset to change that. So I could never really ride hands off the bars, which made long rides difficult.
This eventually led to me sell the frame earlier this year.
These are my opinions, but if someone had experience and a different opinion I would love to hear it.
Couple-of-links on the Bleriot that might be interesting.
One set up for touring:
John/Ron/Ultraromance and his Bleriot:
M. Cook