SL360 Superscripts too low in Preview and published content - vertical alignment issue

In the Storyline 360 editor, the text formatted as a superscript correctly displays with the top of the character clearly above the ascender line of normal text (raised by around 40%). In Preview and published content, as the text size increases, the superscript character appears to be aligned lower and lower with respect to the normal text. I suspect the CSS vertical  implementation of text with a superscript is based on a relative value based on the base line of the normal character or something else. This issue is causing us to use all kinds of less-accessible work-arounds. As a bonus, Preview also has the completely unpredictable scroll bars. 

By the way, the discussion in this thread is no longer applicable since the transition to accessible text.