The Hoth and **** style boots aren't as clearly distinct as you'd think - there are a wide variety throughout Hoth and **** scenes.Actually judging by those pics the height of the new boots does look pretty accurate, as they only seem to come about halfway up his leg. I never realized the Hoth and Bespin boots were so different.
Luke wears the thinner, more canvas looking ****-style boots (though snow-dusted) in the Hoth base yet has "fat" (location) and "thin" (studio) versions of the more brightly colored grey/white striped "Hoth" style (that appear more like fabric) in scenes like Wampa attack and crashed snowspeeder.
ESB boots are weird generally - Dengar wears Hoth rebel boots with stormtrooper shin armor under the straps, and Luke is the only snowspeeder pilot who wears the Hoth style strapped boots with orange flighsuit - all other pilots wear ANH leather boots..
These pics show the Hoth base style look and closer angle of the distinct "Muppet Show" style blaster (solely seen in Dagobah arrival) that HT has finally made with this new fig...