If we will have to stick with the current choice for intro.lyx and tutorial.lyx – Palatino, Helvetica and Courier, then there is still room for improvement: Harmonize the x-heights. An example for mixing Palatino and Helvetica is found here: https://designshack.net/articles/typography/mixing-typefaces-tips-and-techniques/ also: http://create.adobe.com/2013/12/1/eight_tips_for_combining_typefaces.html
That would suggest something like scaling the LaTeX-Helvetica-Clone to 84-92%, 87% being my choice. However, in 2.3-alpha, Courier's scaling option is greyed out? (And Courier is an awful font in general but it is too skinny and runs much too wide in this context also.) This harmonization of x-heights will not only help with overall uniformity and better looking documents on a line by line and page by page basis. It will also give LaTeX a bit more room to play with line-breaking so that incidents of margin violations in the docs might be reduced. Speaking of it: if the format of the docs will from now on be for 2.3 only, then the new microtype feature should be turned on by default. greetings Mike
