When I test rode the LHT it didn't feel right. Really can't remember what size it was, pretty sure 54. A shorter stem might have fixed it. Maybe?? I managed to test ride a Trek 920 52cm, it was even swapped to brifters by the previous customer. Even the seat height was almost perfect. I'm glad he lent me his bicycle for a ride. I'm over 60 and getting shorter, most of that is in the lumbar area, so a shorter top tube/stem is in order, for me at least. The 52 was comfortable for me, even though my previous bicycles are 54. It was a good choice for me.
So 1 size smaller is worth thinking about.