only human so if wrong correct me,but i always thought it was just a design preference on nike part.they had alot of fun with retros in the 90s-00s.they changed the swoosh shape on my beloved bruin in 94 then brought it back in 2002 ish.same with dunk, and your blazers some retros have a thin toe cap some didnt.last time i remember the blazer coming out with the toecap was 1999 or 2000 and they also changed the swoosh size and tongue. they have done a few thick rubber toe cap releases in past few years as QS.why they lost the rubber toecap and brought it back with a suede seam then dropped it again then brought it back in a few releases who knows.
sure one of the blazer lovers will drop some info.