I see that many export options like org-export-with-emphasize, org-export-with-sub-superscripts cannot be set on per-subtree basis using properties.
(defconst org-export-options-alist
'((:title "TITLE" nil nil parse)
(:date "DATE" nil nil parse)
(:author "AUTHOR" nil user-full-name parse)
(:email "EMAIL" nil user-mail-address t)
(:language "LANGUAGE" nil org-export-default-language t)
(:select-tags "SELECT_TAGS" nil org-export-select-tags split)
(:exclude-tags "EXCLUDE_TAGS" nil org-export-exclude-tags split)
(:creator "CREATOR" nil org-export-creator-string)
(:headline-levels nil "H" org-export-headline-levels)
(:preserve-breaks nil "\\n" org-export-preserve-breaks)
(:section-numbers nil "num" org-export-with-section-numbers)
(:time-stamp-file nil "timestamp" org-export-time-stamp-file)
(:with-archived-trees nil "arch" org-export-with-archived-trees)
(:with-author nil "author" org-export-with-author)
(:with-broken-links nil "broken-links" org-export-with-broken-links)
(:with-clocks nil "c" org-export-with-clocks)
(:with-creator nil "creator" org-export-with-creator)
(:with-date nil "date" org-export-with-date)
(:with-drawers nil "d" org-export-with-drawers)
(:with-email nil "email" org-export-with-email)
(:with-emphasize nil "*" org-export-with-emphasize)
(:with-entities nil "e" org-export-with-entities)
(:with-fixed-width nil ":" org-export-with-fixed-width)
(:with-footnotes nil "f" org-export-with-footnotes)
(:with-inlinetasks nil "inline" org-export-with-inlinetasks)
(:with-latex nil "tex" org-export-with-latex)
(:with-planning nil "p" org-export-with-planning)
(:with-priority nil "pri" org-export-with-priority)
(:with-properties nil "prop" org-export-with-properties)
(:with-smart-quotes nil "'" org-export-with-smart-quotes)
(:with-special-strings nil "-" org-export-with-special-strings)
(:with-statistics-cookies nil "stat" org-export-with-statistics-cookies)
(:with-sub-superscript nil "^" org-export-with-sub-superscripts)
(:with-toc nil "toc" org-export-with-toc)
(:with-tables nil "|" org-export-with-tables)
(:with-tags nil "tags" org-export-with-tags)
(:with-tasks nil "tasks" org-export-with-tasks)
(:with-timestamps nil "<" org-export-with-timestamps)
(:with-title nil "title" org-export-with-title)
(:with-todo-keywords nil "todo" org-export-with-todo-keywords))
.. and so on, and then one can have
in the subtree property.