Would you accept to add new faces that could be useful to some major modes ?
I am thinking of
font-lock-tag-name-face
font-lock-tag-bracket-face
font-lock-attr-name-face
font-lock-attr-value-face
and also
font-lock-symbol-face
I am the author of web-mode.el and think that inheriting from those faces would provide better defaults for users of those modes.
It would also ease the work of theme maintainers.
Regards
fx